Usopp frowned and looked up from the metal contraption he was working on the floor in the middle of his factory. The frown deepened as he watched Law shift again to stretch his back in a fruitless attempt to ease the pain in his shoulders, a grimace gracing the surgeon's face with the movement.

Earlier that day, The Heart and Straw Hat Pirates fought with a barrage of Marine ships. Things had been going well until a cannonball was fired towards Usopp, and he hadn't noticed until it was too late for him to move. Law grabbed Usopp just in time but at the cost of slamming them bodily through the Hospital Bay door, with Law taking the brunt of the hit.

Law winced as a spike of pain shot through him. He was going to have to get Chopper to look at him. The ice pack and hot shower have done nothing to ease the tension. He dropped his face into his hands and scrubbed. He knew that Chopper was an excellent doctor, but the fuzzy little bastard was also an excessive worry wort and wouldn't leave him alone if he knew he was injured. God help Law if he had to do physical therapy with him.

"Should I get Chopper?" Usopp asked, standing up from his spot on the floor and stretching. "You should at least check and make sure it's not too serious."

Law glared at him as Usopp's ever-calculating eyes scanned his body, a slight frown on his face. "I don't think it's torn, if that is any consolation. "The way you are holding yourself, it's likely just a strain," Usopp said after a moment.

Law scoffed, "You've been dating me so long that you've suddenly become a doctor?"

"Hm, no, although I do find your medical journals fascinating. Kaya's parents were doctors, and I used to go and assist them sometimes. Your body posture resembles how the kid who fell off his bike and down the hill was holding himself. It was only sprained, but I could tell it hurt from how loud he wailed."

Usopp reached out a hand, hesitating before he touched Law. "I could… give you a massage."

"What?"

Usopp shrugged and smiled, "I have some massage oil with a heating agent. A massage could help you feel better." Usopp knelt by the bed and pulled out a small first aid kit. He rooted through the metal box and procured a small corked vial, handing it over to Law. "I use it on Nami and Zoro sometimes."

Law glared up at him, causing Usopp to laugh. "Nothing like that! Nami gets pain in her neck and shoulders from leaning over her maps, and Zoro, well, he's Zoro. He messes up his muscles with all of the training he does."

Law sighed and handed over the vial, "Fine. It's not like you could do much more damage."

Usopp pointedly held his tongue and nodded towards his bed. "Take off your shirt and lay down on your stomach."

Law winced, struggling out of his sweater. He froze when Usopp's hands met his own and helped him pull the sweater off without jostling his shoulder too much. "You might want to wear looser clothes for a while," Usopp commented, folding the sweater and putting it safely to the side as Law laid on his stomach, arms at his sides and head cushioned on Usopp's pillow. He was tall enough that his feet dangled off the end of the bed.

There was a dip in the bed as Usopp knelt beside him, arranging his limbs and socked feet neatly under himself. "Are you comfortable?"

"As much as I can be, make sure to be gentle."

Usopp scoffed. "For that, I shouldn't be." He uncorked the vial, pouring a generous amount of oil in his palm before corking it and putting it to the side, spreading the viscous liquid over his fingers.

He gently brushed his long fingers across Law's back and gingerly spread the oil along his skin, concentrating on his shoulder and the muscles surrounding it. Law sucked in a breath as the oil warmed his muscles, the muscles in his shoulder slowly loosening under the heat and Usopp's soothing touch. "That feels great," Law sighed, pressing his head into Usopp's pillow.

Usopp hummed, his touch shifting to more of a gentle push. Law opened his eyes, swallowing heavily as he took in Usopp, bent over him, eyes intensely focused on the muscles. Some of his hair fell out of its confines and framed his face, somehow making him look more gorgeous than usual. It did things to Law when Usopp was focused, more so when the focus was on himself.

Usopp leaned forward with a frown, inspecting Law's reactions to his touch. He rubbed along Law's back, and Law couldn't help but shiver as Usopp leaned closer.

Usopp paused, eyes scrutinising Law's face. "Did that hurt? It wasn't supposed to."

"It's fine," Law said blandly. "Continue."

Usopp remained still, clearly still studying him, and Law shifted uncomfortably. However, the other man knew how to read him exceptionally well; despite Law's terse and often rude behaviour, Usopp somehow understood what Law truly meant in his rather lacking or cutting responses.

Eventually, Usopp continued, his touch more gentle. More cream was added and applied in brushing strokes. Law closed his eyes and sank deeper into the bed as the touches lingered more in their warm strokes. Law could not stop the sigh of pleasure that left him when Usopp focused on a particularly tender spot on his left shoulder. "Perfect…"

"Are you sure it doesn't hurt?" Usopp asked, his voice barely above a whisper, sending another involuntary shiver through him. If Usopp noticed his reaction, he didn't stop or change his ministrations.

"No," Law answered breathlessly, cursing his lack of self-control as Usopp worked harder against the knot in his back. "Keep going."

Usopp laughed under his breath, and Law swore he could hear the smile in his voice. "I'm not done with you yet."

Law cursed under his breath, there was no way that Usopp didn't know what he was saying. Usopp shifted, straightening his legs and pushing down more firmly against the muscles. Law's involuntary moan in response was positively salacious, low and blissful. It was quickly followed by a grunt of complaint as Usopp's hands left his shoulder.

His eyebrows furrowed when the sound of Usopp's soft cussing met his ears. There was movement, and the bed shifted as Usopp got off the bed, only to climb back on and straddle his lower back. "God-" Law managed to get out before Usopp's hands returned to his shoulder, and the new position allowed him to finally apply the pressure he'd been searching for. Law's moan was loud and unstoppable as the muscles ached and relaxed at Usopp's downward pressure.

His eyes closed again, and his mouth hung open against the seat cushion as Usopp's hands worked away even the deepest of knots. It was heavenly. "God-ya," he gasped, likely too dreamy of a tone for the situation, but he couldn't help it.

Usopp giggled, "You are more vocal now than when we have sex." There was a shift in pressure as he worked out another knot with expert grace. Was there nothing Usopp couldn't master from a book and five minutes of experience?

Law breathed a sigh of relief as his back relaxed and his muscles thrummed with pleasure and warmth. The strokes turned lighter. They brushed over his shoulders and back, soothing and circling. Almost an apology through touch. It sunk into Law's pleasure-addled mind, and he muttered dreamily in response, "S'okay, God-ya…. Not your fault."

Law shivered as Usopp's fingertips dragged short nails over his skin, his other hand sliding up along the back of his neck. Law nearly purred with contentment and arched up into the touch. Only as those fingers continued up to thread into the back of Law's hair did his mind begin to register the shift in mood. Usopp was touching him now. Not massaging him. Not soothing him. This had nothing to do with Law's sore muscles. His mind rushed to catch up with events, and in his pause in happy pliant encouragement to Usopp, the man straddling him also paused.

Usopp began to pull his fingers out of Law's hair, stopping the descent only when Law started to lean into the touch. There was a pregnant pause from Usopp. Law could practically feel the cogs moving in his brain.

Slowly, Usopp's fingers twisted in his hair, and nails brushed against his scalp. His other hand slid down, fingers ghosting along warm skin. They teased a trail down his right side, tracing his tattoo and brushing over his exposed hip. Law shivered and half-suppressed a gasp.

The fingers in his hair dragged firmly down the back of his neck and across his shoulders. Usopp ran his hands down Law's back and up again, his palms brushing warm and soothing strokes as they went. Law arched into the touch with a long, low hum.

Usopp's talented hands ran up his shoulders, brushing down his arms to his wrists, fingers teasing over open palms. Law pressed his fingers to Usopp's and was rewarded with a low release of breath.

Hands returned to brushing fingertips along his sides as Usopp leaned forward enough to speak into his ear. He braced himself mentally, but his body was too happy with the continued strokes along his sides. The tone was quiet, low and effortlessly seductive as Usopp murmured, "Why aren't you always this vocal?"

"Shut up," He groaned lightly at the voice and the tease and the warmth of the man hovering over his back. "There's something different... about your touch today."

A low, analysing hum greeted him in response. The fingers brushing up and down Law's sides continued on endlessly. Then the teasing tone returned to Usopp's voice as he stated the very firm fact, "You enjoy it when I take control."

Law flushed pink, but the truth was hard to argue. For just a moment, he was tempted to roll over and show Usopp just how much he enjoyed his touch, but he'd rather not frighten the idiot off. There was only so much bravado that Usopp had in a given day. So instead, Law offered his own observed fact, "And you enjoy touching me."

"And the sky is blue," Usopp murmured immediately into his ear. His hands paused in their strokes to hold Law by the hips. "I did not anticipate your reaction," Usopp admitted. Gentle lips pressed a kiss behind his ear. The man settled his weight on Law—shoulders, back, bum. Firm lean weight pressed from Usopp's chest down to his hips. Their thin layers did little to hide the length pressed against Law's ass. The hands-on Law's hips tightened.

Law's eyes flew open even as he gasped loudly in surprise. Law rocked his ass up against the hands and hips, pinning them down. His eyes rolled closed again as Usopp moaned low into his ear. The man's voice ought to be illegal.

Usopp panted in his ear. Usopp swallowed heavily, doubt obviously starting to cloud his actions. A quiet, shaky voice eventually whispered in Law's ear. "I do not wish to change our dynamic irrevocably, Law."

Law smiled against the pillows. "You're adorable." He turned his head, brushing noses as Usopp stayed hovering over his shoulder. He met the dilated but still calculating eyes that flashed a stunning russet green. "I'm comfortable with this chance as long as you are." He broached the short distance between them and arched to kiss the man. It was gentle and soothing, reassuring.

The kiss broke, and Usopp's voice was a low rumble against Law's lips, "I-yeah, okay."

The kiss was harder this time, more demanding. Hips rolled up against Usopp, not allowing the man to forget his arousal. The low, hungry moan into the kiss was priceless. Usopp rutted down against him. His hips shifted to press his length between Law's ass cheeks through the fabric.

The kiss broke with a wet smack of lips and a throaty moan from Usopp. The moan from him sent a shudder through Usopp, and his hands pinned Law down tighter.

"Fuck," Law panted. "I'll grab the lube and condoms. Go wash the oil off those hands before you touch anything."

Usopp groaned but stood to do what Law bade. Law reached for the small black box under Usopp's bed and pulled out what they needed, laying them on the pillow beside his head. He could distinctly hear Usopp taking his time to wash his hands properly.

Law pulled himself onto his knees and undid the button on his jeans, pulling them off and throwing them off the side of the bed. It was worth the surprised stutter in Usopp's breath when he laid his eyes on him. The tent in Usopp's pants was unmistakable. Usopp paused to stare, his calculating eyes taking in Law's bottom as if committing it to memory. It was very likely that Law would see his ass in one of Usopp's sketches in the near future.

Usopp closed his eyes and took several deep breaths before stripping his clothes, allowing them to pool at his feet. His eyes opened, shining determinedly as he returned to the bed, pressing himself against Law. His hard cock was pressed against Law's ass. Warm and faintly damp hands were brushed against skin. Law moaned low, rutting back against the tease, and the sound of Usopp's panting grew louder at the encouragement.

"Keep going," Law encouraged, thrusting back against Usopp.

Hips stilled as Usopp leaned over to grab the lubricant. The weight shifted, and Law spread his legs when Usopp petted against the inside of his thighs, pushing lightly against them, much like Law had done to him many times.

Delicate fingers were soon teasing over his entrance and quickly pushing one and two into him. He was not surprised Usopp knew what he was doing. He could tell that Usopp was copying what Law, himself, had done to him with a slight flare of his own. It made Law wonder if Usopp had ever practised on himself. That was perhaps something they would need to discuss at a later time.

Usopp brushed against his prostate, causing Law to let out a shuddering moan. "Perfect, keep going." Law bit his lip to keep himself from releasing the loud and pleasured moans his body was insistent on pushing out as Usopp spent time preparing him, with various degrees of contact to his prostate.

He barely noticed the pause for Usopp to put on a condom. Lips pressed to the back of his neck as something more blunt was pressed to Law's entrance. "Are you sure this is okay?" Usopp breathed against his ear, evident strain in his voice as he held himself back.

"God-ya, yes." Usopp gave a soft laugh against his skin.

Law's hands moved up to cling to the pillows as Usopp sunk his length into him. "Usopp..."

The pace was slow, but he unerringly hit Law's prostate repeatedly. Moans bubbled from Law's mouth, he was usually quiet during sex, but it seemed Usopp's touch set off every pleasure node in his brain.

Kissing his neck turned into mouthing sucks and firm bites. The bed squeaked in protest at a firm pace, and Law hoped they wouldn't break it. Skin slapped against the skin. Strong hands pressed into his hips. Harsh panting in his ear from the adorable man who drove him fucking insane. Kisses found their way behind Law's ear again, and the low voice was pure bloody sex. "How long have you wanted me like this, Law? Tell me."

"Forever," Law panted in reply. It was the truth, if a bit vague for Usopp.

Usopp bit down behind his ear. "How long?" He shifted them and lifted Law's hips off the bed enough to drive directly to Law's prostate.

Law's mouth hung open in a perpetual moan as he struggled to answer appropriately. Fuck Usopp for wanting words. Law would tell him anything at this point. He'd be in massive trouble if the Marines ever used Usopp to get information from him. "Since our first time," he gasped, fingers clawing at the sheets.

The pace became manic, much rougher than the two of them were used to. The world closed in on itself. It was only all Usopp. Law moaned hoarse and endlessly. His cock ached and leaked against the bed sheets. So close. So insanely close. He buried his face against the pillow but turned his head at a bite to his neck from Usopp, meeting his lips.

The peak rushed over them both too quickly, but it was deliriously overwhelming. Law's climax washed over him without a touch to his cock, making a mess of the sheets as he pulsed and squeezed the cock working his prostate. Usopp's moan as he came was something beautiful. Law memorised the tone and the delicious quiver, somehow different from when Law usually took him.

Hips stilled, and panting breath ghosted over Law's neck as Usopp collapsed on top of him. A soft whine sounded from Usopp as he pressed his face into Law's shoulder.

Long minutes passed before a gentle kiss was on the back of his neck. He didn't say a word, but the move sent a shiver through Law. Law sighed with contentment as he shifted to his side, pulling Usopp against him. He ran his fingers through Usopp's hair and pressed him close, allowing Usopp to snuggle into his chest after pulling off the condom, tying it and throwing it into the general direction of the garbage.

"Thank you for trusting me," Usopp said softly, eyes fluttering shut behind long eyelashes as he lost himself in the warmth of Law's arms.

"Thank you for helping with my shoulder and back," Law whispered, kissing his forehead.

"What does—"

"Sleep. We will talk later."

"But—"

"Shh."