Usopp Makes a Mistake
It was only when Usopp was standing in the doorway of his factory that he allowed himself the silent admission that he may have, in fact, made a terrible mistake.
He had fiddled with his suppressants formula about a fortnight ago. The first week and a half had been unremarkable, and Usopp breathed a sigh of relief that what he had done had worked.
However, he could no longer deny the flush and agitation that was steadily overcoming his body. His sense of smell and touch have been subtly enhanced; scents and sensations suddenly become more complex and detailed. It's been surprisingly marvelous for him as it offered new streams of data that he never had access to before. Data that helped him perfect his sharpshooting to a level that he never thought possible, even with Observation Haki.
He felt undeniably more alive, deliciously present within his body in a way he's never felt before. It's not at all an unpleasant feeling, similar to a mild high or being tipsy. He'd been enjoying it if he allowed himself to be completely honest.
He could have done without the intermittent cramping in his abdomen, all truth be told. Likewise, with the incessant, low-level hum of arousal that's come to permeate his every waking moment. But both were mild enough not to outweigh the more pleasant effects. It's nothing he couldn't ignore. Nothing like the constant, itchy, all-consuming discomfort he vaguely recalls from his early teenage years.
He'd never have started on suppressants if he'd felt like this.
All in all, it'd been perfectly fine, interesting even, if not for how that previously marvelous effect on his sniping and chemistry skills rapidly devolved into something decidedly less so.
He'd spent the morning with Franky, helping him with a new mechanism for the ship and fixing things that had gotten roughed up in the latest storm. But, as the hours passed, he'd found it increasingly difficult to focus; the scents and noises of the ship rapidly grew overwhelming to his senses. It wasn't until he shifted from kneeling to standing and felt the tell-tale dampness within his pants that he realized exactly what was happening. It may have been years, but he still recognized the precursor to heat.
He'd attempted to brush it aside, as he regularly did with other various bodily needs when focused on the various experiments and projects under his supervision. Still, it had been astonishingly persistent until he'd finally grown agitated enough that even Luffy— oblivious though he usually was— had noticed.
When Luffy had peered at him from where he hung from the ropes leading up to the crow's nest, asking him if he was sick with a concerned frown on his face, Usopp had accepted defeat. He had no desire to elaborate on his current condition, so he hastily made excuses and fled to his factory.
His factory is blessedly cool and quiet, a far cry from the bustling floors above. Precisely the balm to soothe his agitated nerves. He rubbed his sweaty hands on his pants and looked around the room, wondering what he should work on first.
He could try to continue working on the prototype pills he and Law were working on. The ones that would counteract the adverse effects of salt water on the devil fruit users who were plunged into it. No, he needed the notes Law had for that.
He could work on the Amanita Virosa specimens he's been growing in his factory's moistest, darkest corner. He could start mixing them with some of his plants and see what new kinds he could create. Or maybe…
Usopp growled and scrubbed at his head, causing his curls to fly around his head. Damn it all, he felt unusually fatigued, and his brain refused to run normally. Maybe he should just take a nap.
He collapsed gracelessly down on the rug and kicked off his shoes, stretching out onto the carpet below him. He closed his eyes and breathed heavily through his nose, allowing himself to empty his mind. He was out in minutes.
~o0o~
The light of the gibbous moon was shining through the porthole when Usopp woke to Law's feet on the steps and the clatter of his factory door opening.
Despite the room's coolness, he was warm and sweaty, and his neck hurt from sleeping awkwardly on the carpet. He listened to Law as the man bustled around his factory, putting things back into the desk drawers, securing loose papers, boxes and materials.
"What are you doing here?" Usopp asked groggily, not bothering to pick his head up from the floor. Instead, he squeezed his eyes shut tightly, wincing as a particularly harsh wave moved the ship.
"I came to check up on you. Nami said you've been down here all day." There was another lurch, and Usopp had to slam his arm down to keep from rolling across the floor. "A storm is coming, so I thought it best to secure your things. You don't want a metal pipe through your head while you sleep."
Usopp sighed and turned to nuzzle against a cool spot on the rug, a small moan leaving his mouth. He's lost interest in anything that Law had been saying and further explored the soft surface.
It felt lovely. How had Usopp never noticed how plush it was? Had the carpet always been this nice? Would it feel just as pleasant on other parts of his body? He should investigate further.
"God-ya?" Law's voice was tinged with concern.
Law was lovely, at first intimidating, but he had the incredible, utterly inexplicable talent for filling Usopp's head with his presence.
He should be utterly terrifying, and yet…
Usopp looked up as a shadow blocked the little stream of light that came from the porthole. He peered at Law from the delightful rug on the floor, a pleased smile crossing his face without conscious thought. He gave a slight, warm hum of greeting, which only seemed to confuse Law, or so the way he frowns at Usopp appears to indicate.
"Are you alright?" Law questioned as he crouched down beside Usopp. He reached to rest his hand against Usopp's brow and brushed aside sweat-damp curls. "You feel feverish."
It felt much better than any clinical appraisal had any right to—hot, cool, and tingling all at once.
Law's hand shifted from his forehead to his cheek, and the movement sent frissons of pleasure wavering across Usopp's skin. Their proximity flooded Usopp's nose with Law's scent, something akin to tea, steel, and smoke, with the faintest underlying trace of antiseptic. He moaned before he could stop himself, turning his face to nuzzle blissfully against Law's palm. He kept his eyes shut, but he felt the tension snap into place beneath Law's skin.
"Usopp, have you taken something?" There was a note of disapproval in Law's tone.
Oh. Oooh— Law thought him high.
Not many knew, but Usopp tended to sample his experiments. What better person to test out things on than himself, after all?
It was a reasonable deduction on Law's part, considering how many times Law has caught him in questionable positions over their time together. Dilated pupils, flushed skin, lethargy, perspiration, and a slight tremor in his hands. Usopp's exhibition of uncharacteristic behavior and euphoric response toward positive stimulus was easily attributable to various combinations of substances, both experimental and not so, most of which Usopp has at least a passing acquaintance. But, Law was wrong. Oh, so very wrong. Well, this time, at least.
"Nope." Usopp pops the 'p' in a tiny exhale against the warm skin of Law's palm, easing his eyes open to assess Law through his long dark lashes. Law's shoulders relaxed, and he heaved a deep sigh of relief.
And then promptly froze again.
His eyebrows knit as he began to scent the air unconsciously. "Are you...in heat?"
"Mmm," Usopp rumbled as he rubbed his cheek against the carpet again in a lazy semblance of a nod. "I may have tampered with the formula."
"God-ya!"
"I'm so tired of the hormones!" The younger man whined. "Did you know that our hormones still go crazy even without regular heats? I dropped some ice cream a few weeks ago and burst into tears— I don't even like ice cream, but I was getting such severe hot flashes that I needed something to cool off." He tossed himself onto his back restlessly, the presence of an Alpha beginning to intensify the prickle of heat beneath his skin. The fabric of his suspenders chafed unbearably against his nipples, so he shamelessly pulled his arms free of the restraints. "I must have taken something out, or added something that countered it, or miscalculated."
"Didn't think you were capable of miscalculating anything other than yourself." Law teased before visibly transitioning back into Doctor mode with a small, firm shake of his head. "When did you start altering them?" He moved his hand from Usopp's cheek to press two fingers against his pulse point. The continuous contact set Usopp's already fluttering heart to racing, and he squirmed helplessly, squeezing his eyes shut to help focus as he responded.
"Ten days. I didn't feel any symptoms until about three days ago. But…it's erm…." Usopp trailed off, fighting against a creeping flush of mortification. He knows it's foolish to feel embarrassed about this; he's an adult, and Law is a medical professional. But he felt oddly exposed, discussing something so openly that he's tried for so long to repress. "I haven't kept up with having heats since my first one."
"You haven't even had short ones?" Law's voice took on a concerned note, and Usopp didn't need to open his eyes to know that a deep frown was etched into his face. He finished assessing Usopp's heart rate but didn't pull his hand away, leaving it resting over his collarbone. Usopp's sure it's meant to be comforting, but it's anything but. Even the casual contact between their bodies feels maddening. "Even when people skip their heats, it's usual to have bursts."
"Nothing." Usopp said softly, "Unless you count the hot flashes."
It's as though a strangely pleasant fire had been set alight beneath every inch of his skin, wherever it touched Law's. A slight shudder wracked his body, and he gave into the urge to pant lightly. Law's tongue peeked out to lick his lips, and Usopp's eyes felt magnetically drawn to the sight.
"More unusual than you miscalculating. When exactly was the last time you had a heat?" Law asked in the no-nonsense, shameless tone of Doctors everywhere, despite the unquestionably intimate nature of the question.
Do they practice that when practicing medicine? Are they forced to chant, in unison, the most abjectly mortifying queries known to humanity, crescendoing until they finally reach a sort of nirvana of shamelessness? It seems unlikely, but it amused Usopp so to think about.
Usopp knew he was dithering, but he's not particularly enthused to incite Law's anticipated reaction.
Oh, fuck it.
"Approximately… four years ago?"
"Four…" Law trails off in horror. Ah, yes, there it was. "God-ya! Please tell me you're joking."
"Um, no." He drags out the vowels as long as possible as though it might delay the exchange.
"Four years? And then you just started messing with them, not knowing what would happen. What were you thinking?" Law's eyebrows appeared to be trying to flee from his indignation into his hairline. He resembled nothing so much as a displeased sea leopard.
It would have been more comedic if he weren't the target of said anger, but Usopp still couldn't help but find it somewhat endearing.
Usopp waved a hand dismissively in response to Law's prompting. "Well, obviously, that it wouldn't be an issue. And honestly, aside from my mild discomfort, I see that I was correct."
"You don't—" Law paused, brought his hand from Usopp's chest to pinch the bridge of his nose and took a long, deep breath. "Usopp, a thirteen-year-old could have told you that was a terrible idea! Has no one gone over this with you?"
"No." Was Usopp's simple reply.
Law breathed out heavily through his nose and gritted his teeth. "You're experiencing what is known as rebound estrus. It's a kind of false heat triggered by major hormonal fluctuations. These are most common after a miscarriage but can also happen after sudden suppressant cessation."
He scrubbed his hand over his face with a growl of aggravation. "It's one thing to skip the odd heat here or there, but the whole point of a placebo cycle is to allow your system to moderate its hormone levels. Expressly so that if suppressant use is to be discontinued, the inevitable hormonal spike will be limited."
"Ah, well. Oops."
"Your hormones are probably skyrocketing." Law reached out to smooth a hand comfortingly over Usopp's curls, and he barely suppressed the gasp that threatened to escape him.
"Is there anything that could stop it?" He asked plaintively, partly out of genuine desperation and somewhat to distract from his reaction to Law's touch.
"No, unfortunately not. If you'd have started back on your pills as soon as the preheat symptoms started or had even gotten a high-dose suppressant shot a few days ago, maybe. But this far into heat? Doing anything of the sort now would be incredibly dangerous to your reproductive system. So you're just going to have to ride it out."
Despite his state, Usopp couldn't resist the opportunity to needle Law a bit, and so he raised a brow at the arguably poor choice of words. As expected, Law blushed and looked away.
"You know what I meant!" Law snapped, face still flaming. He refused to look Usopp in the eye and had developed a sudden, determined interest in the periodic table on the wall. He opened his mouth as if to speak again, closed it, and then ventured hesitantly, "There is one thing that may help."
"What?" Usopp demanded, propping himself up on his elbows in eagerness.
"You're not releasing a viable ovum, given how long you've been repressing your cycle. So it should be perfectly safe to share your heat with an Alpha. Without any concerns."
Usopp gaped, slowly absorbing the meaning of Law's words. "You mean letting an Alpha knot me." He hadn't thought it possible, but Law flushed even deeper.
"I was trying to be a little less… explicit, but yes. The endorphins released when the glands inside the Bartholin ridge are compressed ease heat discomfort and help end it as much as a day earlier."
"Oh."
"Is there someone I can go get?"
"N-n-no." He found himself stammering, his face blooming scarlet to match Law's, the heated blush creeping down his chest. "No. There isn't anyone that I can, um, get." He bit his lip and tried to keep them in, but the words spilt out of him unintentionally. "I've never…, and I could never look any of them in the eye again if…."
"You've never actually… oh." Law's face snapped toward Usopp's. "Do you mean— at all?"
"I.. I've not had the opportunity," Usopp glared to the side, refusing to look Law in the eye.
"That's fine. You're only nineteen."
"I know it's fine… have you?" He asked, overcome by the sudden, fierce need to know.
"Have I…?" Law looked momentarily befuddled before realization lightened his face. "In general or—"
"I know you have in general. You're gorgeous," Usopp snapped. "I meant with a male omega in heat."
"No, I haven't."
Usopp narrowed his eyes and studied Law's face— lips turned down in thought. He found no deception.
"You're not lying to make me feel better."
Law raised an eyebrow, "When have I ever lied to make anyone feel better?"
Usopp frowned deepened, "True." Usopp threw himself back down against the carpet and sighed, closing his eyes. He froze when Law dropped down beside him. Opening an eye, he looks over at the doctor. "What are you doing? Don't get comfortable. You aren't staying!" Usopp snapped, leaning up and glaring at the man beside him.
"Why not? I'm a doctor. I can help you through it."
Usopp scrunched up his nose. "I can smell you just as well as you can smell me. It's horrible." he sighed heavily and rubbed a hand over his face. "It's making me want to do all sorts of things allied pirates shouldn't be thinking of doing to each other—" Usopp growled and slammed his hands down, "I didn't mean to say that."
"Hmm," Law stared up at him with narrowed eyes. To him, Usopp smelled divine, and he wanted those same things Usopp was thinking about.
Yes, he had initially written off the younger male as nothing more than a talker with nothing to back it up, but he had grown to respect him over their time travelling together. It gave Law a chance to see the great willpower the other man possessed, his intellect and his inventive nature. And, despite Usopp's rather unique features, he was quite gorgeous. With his caramel skin and long riotous curls that trailed down his back.
But Usopp only wanted it now because he was in heat.
Against his will.
"You smell like tea, antiseptic and ink," Usopp stated after a moment of silence. He'd fallen back onto the carpet, head cushioned on his folded arms.
"Gunpowder, blood oranges, paint, no. It's something artsy that I can't quite put my finger on... maybe charcoal." Law shifted, and Usopp's eyes trailed down the lean body, stopping at the pronounced bulge in the front of Law's pants.
"Sorry," Law sighed, but didn't move from his position, obviously unbothered by Usopp's focus on him.
"Hormones. My pheromones are causing a precipitate response… estrual inebriation? It'll lower the social inhibitions of any unbonded Alpha nearby. I would compare it to how many act after an evening of moderate drinking."
Usopp brushed some of his curls out of his eyes and sighed, "Estrual inebriation can cause people to exhibit heightened flirtatious behavior, speech disinhibition, and some aggression toward other unbonded Alphas." Usopp stretched, "That would explain your tiff with Zoro earlier today."
"You're anxious," Law stated blandly. "Also, I'd be more impressed if you didn't conveniently forget the part about suppressant withdrawal."
"My anxiety doesn't change the fact that you are essentially drunk off me."
Law stiffened beside him before sighing heavily and sitting up. "You were right, God-ya. I should probably go. Do you need anything? I think between our two ships, we should have enough for your heat. If not, there is a small island less than half a day from here."
A sudden, miserable panic swooped through Usopp at the thought of Law leaving. Then, before he could think better of it, he darted out his hand and clamped it around Law's wrist. Law froze, crouched beside him. Their eyes connect, and suddenly a new tension that hasn't been there before thrums between them.
"Law," He whispers hesitantly. But, then, an idea occurs to him— a very terrible idea.
It's quite despicable of him to even consider exploiting their ally-ship, but oh— how he wants to. He swipes the tip of his tongue out to wet his lips, and Law's eyes snap to the slight movement almost magnetically.
"I… I may have… I am not sure what to do… would you…." Usopp swallowed heavily. "Would you be… amenable to…."
"Are you asking me to stay, God-ya?"
"I—I… no! Maybe." Usopp stuttered, panic flashing in his eyes. "N-n-never mind! You may go. I am smart enough to figure it out on my own."
"God-ya, I'll stay."
"Are… are you sure?"
Law merely rolled his eyes, and silence fell over them. Usopp fidgeted with a loose string on his pants. "So, how do we, um…." Usopp rubbed the back of his neck as he gestured awkwardly with his right hand between them. "You know."
Law smirked darkly and pulled his shirt over his head, throwing it off to the side and raising an eyebrow in challenge.
Usopp worried his lip and fidgeted where he sat, unsure where to go from there. He froze as Law reached out to cup his hand to Usopp's face, his thumb brushing over the arch of his cheekbone. The movement sent a bolt of lust straight to Usopp's groin.
Law rocked forward, pausing a mere inch from Usopp's lips. "May I kiss you?"
"Oh… yeah, that would be… cool." Usopp was confident that his heart momentarily stopped when Law's lips pressed against his. A mortifying sound, suspiciously like a squeak, escaped him and Law pulled back to scan his face.
"Are you okay, God-ya?"
Usopp swallows, bobbing his head in a shaky little nod. "Yes. I— yes. It's… good."
Law hummed in approval and leaned back to slot his lips against Usopp's again. The kiss started chastely, but before long, his tongue was teased against the plump swell of Usopp's lower lip, seeking entry. Usopp moaned unthinkingly as he opened to it and shuffled his knees forward, giving himself over to the frantic drive to press himself against the solid Alpha body before him.
It's Law who groans as Usopp's half-naked, feverish limbs press tightly against and around him. They swallow greedily at one another's mouths in a tangle of tongues and nibbling teeth. When Law breaks away to mouth along Usopp's jaw, he whimpers plaintively and offers up his neck.
Law successfully fumbles open the resistant fastener of Usopp's pants as Usopp traces his fingers across the tattoos on Law's chest. They broke apart fleetingly while Usopp wriggled out of his pants and kicked them to the side. Usopp clambered up on his knees and continued to slide his fingers across Law's body as Law wrestled open the fly of his jeans, impatiently pushing them down his hips. He noticed Usopp's hesitation, his hands stopping shakily at Law's abdomen, and Law paused in taking off his clothes to cup Usopp's face in his hands.
Usopp turned his face to nuzzle into a palm. His eyes fell shut in bliss as he breathed in the warm Alpha scent. Law let him scent for a few moments, and then his hands slipped down to cup Usopp's shoulders and gently pressed him back onto the carpet.
Usopp watched, enraptured, as Law shamelessly worked his pants down over the bulge of his erection and finally revealed his cock.
Usopp breathed a mental sigh of relief that it's nothing like the over-large monstrosities presented by the Alphas in magazines and erotica. Law's is slightly longer and girthier than the average Beta's, but not by much. The actual difference lies in the spongy-looking erectile tissue at the base of it, where his knot will form at climax. It was swelling slightly already, in reaction to the scent of Omega in heat permeating the air, but remained soft and yielding for the time being.
"It's very… nice," Usopp said without thinking and immediately cringed internally at the pitiful compliment.
Nice? He may as well have patted Law on the head and offered him a cookie.
Law didn't seem bothered in the slightest, however. In fact, he looked rather pleased, so Usopp pushed determinedly past the mortification and reached out shyly to stroke his hand down the warm line of Law's abdomen. All of Law is very nice.
His fingers brushed over the dusting of hairs beneath Law's navel and trailed down until he reached the thick nest of curls that surrounded his erection. He wrapped his hand around the scorching hot appendage and squeezed lightly. Law moaned unabashedly, then reached down and drew Usopp's hand away.
Law grinned wolfishly and crawled up over Usopp's body to nip playfully at his lower lip with a friendly growl. "Your turn." He grasped the waistband of Usopp's pants and slowly peeled them downward. Usopp lifted his hips to allow Law to ease them past his bottom as Law drew them down his legs and off.
Usopp spread his legs slightly and pulled Law down to press their lips together again. Their hips rolled together, the sweat slicking their skin made for just the right amount of friction. Law desperately broke the kiss to mouth down along the curve of Usopp's neck, biting and sucking while Usopp moaned and arched into it. Law pulled away suddenly, causing Usopp to groan in frustration.
"Condom?" Law asked, then, after a beat, dropped his head down onto Usopp's shoulder with a groan. "You don't have any, do you.?"
Usopp raised a sardonic brow and frowned dismissively. "We don't need one."
"We don't—" Law raises his head to gape at him. '"Of course, we need one, God-ya!"
"Why? You said there wasn't any concern regarding… that."
"Yeah, but— God-ya condoms aren't just for contraception!" Law shook his head in disbelief. "I'll go grab some from my ship and—" As he moved to rise from the carpet, Usopp groaned in irritation and grabbed his forearm to pull him back.
"I'm sure, being a doctor, you habitually test yourself, and I'm certainly not a concern in that area." He wound his limbs around Law in his best imitation of an octopus and pressed their sweat-damp bodies together enticingly. "Get them later, but for now, I—" he ground their hips together pointedly, making them both gasp. "—am about to lose my mind."
"Okay," Law panted agreeably. "Okay. This once— but I'm going to grab them after. It's a huge mess without them." Law settled back down, mouth returning to its exploration of Usopp's neck. Law nuzzled under Usopp's ear, pressing a kiss there. "Tell me what you like." He leaned up to press his face into his neck again and scented him. The gesture set Usopp aflame, and he squirmed and clasped a hand over Law's nape to encourage hold him in place.
"I don't know, whatever you like. But I don't expect you to, um—" he panted feverishly, instinctually parting his legs further as Law's hand continued its casual stroking. He tilted his head to expose his neck to Law's ministrations better. "You needn't feel obliged to—"
"Usopp," Law stopped and braced himself on an elbow to look at Usopp in exasperation. "I need to prepare you!" He promptly lowered himself down again to resume mouthing at Usopp's neck. "Foreplay is important," he adds, punctuating with a playful nip at taut muscle.
"I don't care!" Usopp grumbled, but his body belied his protests, writhing up against Law's lips as he worked his way down. When Law stopped to lap and suck at pebbled nipples, Usopp mewled in frustration, hips jerking upward of their own volition.
Finally, Law slid further and settled on his belly between Usopp's legs. Usopp seized the momentary respite from sensation to argue further. "An Omega in estrus requires little to no preparation before intercourse. You're fine to just get on with it."
"Not to me, it isn't," Law replied placidly, unmoved. He made more room for himself, pushing upward until Usopp folded his knee and planted his foot flat against the carpet. He stroked his thumb gently over the slick opening just below Usopp's cock, where testicles would hang were he an Alpha or a Beta, then carefully slid two fingers inside. "You're so wet for me." He said in pleased surprise as he leaned his forehead against Usopp's tawny thigh to watch his fingers work. "Does that feel good?"
Usopp dropped his head back against the carpet and groaned brokenly, nodding. Law's fingers swiveled deliberately, searching carefully for something along Usopp's inner walls. Finally, they stroke over a small bundle of nerves, and Usopp keened, arching his back and spreading his legs unconsciously wider.
Law clasped the base of Usopp's member with his unoccupied hand. "I've never done this before, so I might not be the best at it." He warned.
"What," Usopp panted, raising his head in confusion. He blinked down at Law's mouth, which is torturously close to his cock, dumbfounded.
Surely, Law wasn't planning to attempt that.
Alphas, especially captains, don't do that— certainly not for Omegas. And he's slightly concerned that he might actually spontaneously combust if Law does what he appeared to be planning.
"Th—that isn't necessary. I'm already more than aroused enough to proce— oh god." The velvet heat of Law's mouth enveloped the tip of Usopp's cock, and while his brain had possibly evaporated, he couldn't find the will to care.
"I'm sorry— you were saying?" Law pulled off to smirk up at him. Usopp resisted the urge to reach down and push Law's head back into place, but only just. Instead, he pressed his fingers into his hips and whined. He'll do anything, say anything, so long as Law resumed what he was doing.
Thankfully he doesn't have to, as the Alpha went back immediately. From the first few slightly awkward bobs of Law's head and the way he fumbled to coordinate his hands at first, it was apparent that he had no experience with it. But he took to it quickly, and before long, he had Usopp writhing and moaning helplessly beneath the twin sensations of his mouth and the steady twist of his fingers inside. The urgency of the feeling built quickly until Usopp's startled to realize just how close he was to climax.
"Law…" he sobbed, hitching his breath when Law hummed around him in response without stopping. It was so good, so very incredibly good, but he couldn't— he needed something else. Usopp whined with increasing desperation and reached to scrabble frantically at Law's hair. "Law, I— I— stop."
Law slipped off instantly with a wet pop, releasing his cock and slipping his fingers out entirely to look up at Usopp, red-faced and concerned.
"Are you okay? Did I do something—" He froze and took in the sight of Usopp's heaving chest and glassy eyes. A mixture of relief and amusement melts across his face. "Oh."
"Yes." Usopp gasped as he brought himself under control, just barely managing to keep his hips from rocking upward. "I just… I need…"
"It's okay." Law soothed Usopp as he put his abdomen gently. "I know what you need." He sat back on his heels in a smooth motion and rubbed at his nape. "From behind would be—"
"Like this." Usopp heard himself pant, clutching Law's sides insistently and trying to coax him forward. "I want to see you."
"Are you sure?" Law shuffled forward on his knees between Usopp's legs, then hesitated. "Afterward, we'll be…."
"Yes, Law, I am aware."
"It might be uncomfortable for you. A bit smothering."
"We can roll on our sides if it gets too much," Usopp amended before he wrapped his arms around Law's shoulders and pulled him close before wrapping his legs around his waist.
"Oh god, Law, please just—" He started, then broke off to moan as Law guided himself forward and pushed inside.
God, yes.
Why had he never done this before? The reasons eluded him, but it was terrific. There were indeed better ways to describe it, but they escaped him. All he could think about was the blunt, unrelenting pressure making a space for itself inside of him. Law carefully buried the entire length of his cock and then stilled, taking a long, deep breath.
"I need… more." He gripped Law's shoulders as the taller man planted his knees for better leverage and began steadily pumping his hips. He started gently, but at the urging of Usopp's shifting hips, and the demanding instructions hissed into his ear, he soon thrust in earnest. Usopp moaned, digging his fingers deeper into the sweat-slick curve of Law's back and lifting his hips desperately to meet the increasingly hard thrusts.
Oh, oh.
He revised his last thought— it was better than terrific.
He hadn't realized just how marvelous sex could be. Law was all around him and inside of him, his sweat and saliva smearing across Usopp's skin, his breath mixing with Usopp's as they panted together. He suddenly had a much better understanding of why people in all those stories seemed so mad for it; enough to lie, cheat, steal and kill over it.
They continued, gasping against one another's mouths when they no longer had the coordination to kiss properly.
"This isn't going to…." Law gulps desperately for air enough to speak. "Last… very long."
"No," Usopp agreed, nuzzling rapturously into the damp hair behind Law's ear. "Initial copulation during estrus is—" He groaned at a particular motion of Law's hips. "Yes, right there— is typically the shortest in duration. Ten to… uh, fifteen minutes… on average. Oh god, yes, there. Harder."
"How do you know that?" Law obliged him, hands pressing Usopp's hips upward to maintain the angle better. "And not… anything about what pulling yourself suddenly off suppressants might do?"
The new angle sent a stream of breathy little 'ha-ha-ha's' falling from Usopp's lips, delaying his response. "It's in one of my mother's old science books," Usopp managed.
"Of course it was." Law sat up, pulling Usopp's hips into his lap as he did, thrusting relentlessly into him. Usopp wound his legs about Law instinctively to keep him seated inside, hands fisting the carpet on either side of his head. "There you go," Law panted appreciatively as he wrapped one hand around Usopp's copiously leaking erection. The words rippled like a shock wave through Usopp. Something in his groin clenched wonderfully, and he whined plaintively at the sensation.
"God-ya, look at you," Law praised, stroking his cock in a tight, merciless grip. Usopp felt the knot bumping against his slick entrance with every thrust. It was swelling quickly, almost at its full width; if Law didn't knot him soon, it wouldn't be able to fit past the tightening ring of muscles just inside his opening. A sudden flood of panic seized Usopp. What if Law doesn't know when to knot him!? He needed it— it was the only thing that would extinguish the maddening want.
"L-Law," he cried, and Law dropped over him again, releasing his cock to smooth hands over Usopp's sweat-damp curls instead.
"Don't worry, I've got you, don't worry," Law murmured against Usopp's ear, nipping gently at his earlobe and Usopp quivered in relief. But, of course, he knew, of course.
"Do you want it?" Law growled, slowing the speed of his thrusts to a teasing drag. Usopp was confident that he'd burst into flame at any moment, but he nodded frantically regardless. Law's answering laugh was hardly more than a low, heated rumble just below his ear, where he mouthed wetly at a patch of skin just above Usopp's scent gland. "Yeah? What do you want? Tell me."
Usopp's mind stuttered to a confused stop.
What did he want? Usopp didn't think he should have to spell it out. Ohhh— Law was teasing him. He bit his lip and moaned at the realization. Why on earth is that so incredibly arousing?
Law rolled his hips steadily, neither slowing nor speeding up. At the end of each stroke, he deliberately pressed the hot swell of his knot tightly against Usopp, pulling back just before it slipped inside. Usopp sucked in a shaky breath and sobbed.
"Your knot. I want your knot. Please, Law."
Law groaned deep and low at the words and thrust, his knot shoving past the slight resistance, throbbing as it swelled to completion. The ring of muscle clamped down around it, squeezing and holding it snugly in place. As Law's cock twitched in release, he bared his teeth against the taut skin of Usopp's neck and, for an instant, Usopp was sure that Law was about to bite him.
He didn't, of course— and even the thought should fill Usopp with horror— instead, his eyes rolled back, and he cried out as his cock spasms, hot fluid splashing up between their bellies. Law lifted his head to clumsily mash their mouths together in a kiss as they rode out the aftershocks, shuddering against one another helplessly.
Finally, Law slumped on top of him, face buried in Usopp's neck and chest heaving from the exertion. Usopp let his legs go slack about his waist but left his ankles crossed loosely to avoid jostling them where they were joined. Law's somewhat heavier than expected, but Usopp found the warm weight pressing him into the carpet oddly comforting rather than stifling. He hummed contentedly and absently rubbed his palms over Law's back.
"D'you want to roll over?" Law mumbled sleepily.
"No. I'm fine like this." Usopp replied, surprised to find that it was entirely accurate. "Go to sleep." The haze of heat cleared his mind, and he relaxed at his own words.
He listened to Law's breathing even out as he drifted to sleep and resisted his own lethargy. He raised a hand to stroke Law's hair, idly wondering how often they'd find themselves in the very position going forward.
AN: Hmm, this is quite new for me. Not sure what I think.
I do quite like the idea of Usopp just spilling out facts he's learned from various texts when he is nervous though, I think I'll keep that.
Let me know what you think.
All the best,
Chandlure