It came as a surprise to no one that Reborn and Tsuna ended up together despite both being Alphas. It had, however, been a surprise when Tsuna he ended up presenting late as an Alpha instead of staying a Beta or even as an Omega. A surprise to everyone apart from Reborn, that is.

He had been unbearably smug about being right for months. Somewhere in Reborn's subconscious, from the exact moment that he first lay eyes on Tsuna, had cocked his head, sat up and taken notice of the petite brunette at the time.

Years later, when the two fell into bed together, there wasn't a struggle of dominance as one might have expected.

Tsuna hummed low as he felt Reborn prod his prostate. Reborn paused, glancing at the other, slightly puzzled.

"Tsuna?"

"Hmm?" Tsuna murmured, his reaction muted.

Reborn rubbed his fingertip across the prostate again, slightly puzzled at the non-reaction. When he saw no further reaction, not even the slightest hint of there being a flicker of pleasure, he pulled out and gave the other a dry look.

"Is there something you're not telling me?"

Tsuna hesitated and sat up, pressing a lingering kiss to Reborn's lips. He brushed his thumb across Reborn's cheekbone, smiling slightly. "Unfortunately, I'm unable to feel pleasure from my prostate. At most, I only feel a few sparks before it dies off."

Reborn growled and ran his fingers through his hair in a moment of frustration, "And you didn't mention this before, why?"

The light-haired brunette shot the other a slightly sheepish and bemused look, "You've never even thought of bottoming for someone before."

Reborn glared at his Sky. "That isn't the point," he bit out.

While it was true the thought had never once crossed his mind, the fact that Tsuna was unable to feel the pleasure physically from his prostate had thrown him for a loop. Reborn narrowed his eyes, wondering what they would do now. He wondered if he would be able to surrender control to the other. As he pondered, he took in his Sky's features. Tsuna was slightly shorter, and his muscle tone had bulked up over the years. Although the other was leaner and seemingly more petite compared to other typical Alphas, he had come a long way from his past self. The Sky's sheer presence radiated strength and security from his very pores.

While the hitman had never entertained the thought of ever bottoming for someone before, nor would he ever for anyone else, for Tsuna he was even willing to march into Hell for him. The amount of love and affection that he felt for the other Alpha was a constant companion in his everyday life that burned brightly in his chest.

As he was being scrutinised by Reborn, Tsuna felt a bone-deep satisfaction at the very core of his being, a smirk forming on his lips. He wasn't sure if it was his Hyper Intuition or his inner Alpha, but it was purring nonetheless, whispering and prodding for him to press the other Alpha into the sheets and show the World's Greatest Hitman the pleasure that could only be felt from submitting to him.

Reborn instinctively shivered at the half-lidded eyes directed at him, the other's cocktail of pheromones radiating affection, love, lust, hunger. When the Sky reached across and brushed his fingertip ever so lightly across Reborn's nipple, he sucked in a breath and bit back the gasp that threatened to leave his lips at the sudden jolt electricity that shot through his veins.

The smirk on Tsuna's face grew larger. Leaning in, he whispered, hot breath brushing against the hitman's ear, "Don't you want to feel me press deep inside you? A place no one else will ever touch. Brand you, mark you, claim you to be mine for all eternity?" The Sky let his hand drift below, cupping and lightly squeezing the other, eliciting a strangled moan from the Sun.

"Fuck," Reborn breathed out, his thoughts clouding over. "Do what you want," he said, still slightly unwilling to giving up his pride. The Alpha within him was screaming at him to push the other down instead, but he resolutely ignored it. There was no point to having sex if it wasn't the two of them weren't feeling pleasure and only one instead.

Tsuna growled and in a burst of movement, pressed the hitman down into the sheets. Licking his lips momentarily, he pressed a kiss to the other's lips. When the Sun didn't open for him, he gave a firm stroke to the member still in his grasp, causing Reborn to gasp at the sudden pleasure. The Sky took the chance to plunge his tongue into the wet cavern in front of him, caressing the other's tongue, stroking the roof, mapping out the insides of his lover's mouth.

The Sun's hands clenched into the sides of the bedsheets, desperately trying to keep a hold of himself. He could feel the other's hands on him, trailing down and raking the skin, leaving red marks in their wake, the small jolts of pain adding to the sensual pleasure he was being subjected to.

Tsuna pulled away from the bruising kiss and started trailing kisses down the hitman's neck, sucking marks along the way. The hitman was sufficiently distracted by the growing pleasure and didn't realize when the other had popped open the lube before spreading it over his fingers. The Sky placed a bite on the other's neck, causing him to moan and unwittingly arch his back as the pleasure and pain mingled, assaulting his body.

Tsuna's devious hand squeezed and pumped him slowly, a fingernail lightly scratching his sensitive slit, the other hand circling his entrance and pushed in a digit, causing another low moan to be ripped out from his throat as he saw stars.

The moment his prostate was prodded, all previous lingering thoughts flew out of his mind. The pleasurable assault on his body left him shivering in anticipation. Tsuna introduced the second digit and he pumped him in time as he abused the bundle of nerves hidden within the taller Alpha.

Reborn could only gasp and take the repeated assault to his prostate, the sheer amount of pleasure he felt was overwhelming. With the whiteness filled his thoughts, he didn't even feel anything as a third finger was introduced. All the while, lips and teeth were still nipping at his neck, member still being pumped in time. The combination of the three was leaving Reborn completely devoid of strength or will to do anything but accept the domination from the younger Alpha.

"You're enjoying this, aren't you, Reborn?" Tsuna purred into Reborn's ears, his words tinted with an Alpha's intonation. "You're clenching so erotically around my fingers." Tsuna sped up his pace, and the Alpha under him responded beautifully. The hitman's pupils continued to dilate in the sheer pleasure he felt until they looked completely black. The member in his hand twitched and with the combination of a thrust on the bundle of nerves and a pump from that sinful hand, Reborn let out a cry before hitting his climax, his muscles going taut before relaxing.

The hitman was left gasping as he suddenly felt a wave of exhaustion, unprepared for the suddenness of his orgasm along with the aftershocks of pleasure. Tsuna let out a growl, the Alpha inside him was thoroughly enjoying the effects he had on the hitman, "We haven't even gotten to the main event yet, and you're already looking so wrecked."

Reborn groaned, squeezing his eyes shut, forget marching into Hell for his Sky, he was obviously the devil himself.

Tsuna continued pumping Reborn slowly, working him through his refractory period, which was unusually quick even for an Alpha, showering the other with kisses. Soon the hitman's eyes flew open and he was once again biting back moans of pleasure. The fingers inside him never let up even for a moment, the pleasure the other was inflicting on him was utterly overwhelming. Tsuna released his grip on the Sun's member before licking a strip, bottom up, hand pressing the hitman's hips down as he reflexively thrust up, groaning.

"Fuck," the hitman gasped. "Fuck me already!" he snarled, trying to push the pleasure down. He glared at his smug lover, pulling the other up for a kiss.

The smirking Sky slowly devoured the other's mouth, refusing to the other's challenge of dominance in kissing as he slowly fucked the arrogant hitman's mouth with his tongue, pulling moans from the other. While the Sun was sufficiently distracted, he removed his fingers from his Sun's entrance, causing the other break the kiss, a small whine at the back of his throat from being left open and empty.

The hitman tried to hold onto his thoughts as the other Alpha pressed his member into his twitching entrance, penetrating to the hilt with a smooth thrust. The pleasure of suddenly being filled up mingled with the slight pain of taking something as huge his Alpha's cock into his virgin entrance, causing him to see stars. He gasped, back arching. His hands fell away from the Sky, clenching into the bedsheets below.

Tsuna pulled out before thrusting back into the warm, clenching heat, aiming to hit the bundle of nerves that had the hitman moaning in pleasure earlier. "You might not be able to sit properly tomorrow," Tsuna purred, his voice dropping an octave. Reborn let out a moan at the reintroduction of pleasure from his prostate being hit directly. His inner Alpha was still struggling slightly against the pleasure that the other Alpha was bringing him, unresigned at being dominated.

Every thrust, the Sky struck the bundle of nerves with unfailing accuracy. The hitman clenched at every thrust and let out little moans, pleasure tearing through his body unlike any other he had experienced before. The Sun's body unwittingly jerked at each thrust, his body betraying him to the pleasure he felt. The heat was pooling in his body, slowly building up with each relentlessly accurate thrust into the bundle of nerves.

The pleasure the other Alpha was inflicting on him would wreck him for anyone else. As an Alpha, Reborn had experienced no small amount of bed partners before, both man and woman, Alpha, Beta and Omega, and he had never felt this good. Was it just that his body was inclined towards being dominated or was it just that Tsuna was that good?

The limited hold Reborn had on his thoughts was slipping away with every thrust as the Sky hit the gland inside him. The smaller Alpha growling out words of praise and no shortage of dirty things, combined with the pleasure he was receiving from being pounded into started eroding the control he had over himself.

The tight control he usually had was slipping away from his grasp with every thrust, before the tentative hold he had on it suddenly snapped.

Reborn let out a scream, pressing his head into the pillow, bearing his neck. "Ah! Hah, Alpha, please!" he screamed out, hole clenching even harder on his Alpha's large member, his Alpha instincts finally submitting under the other's relentless assault of pleasure.

Tsuna growled, pleased at the act of submission from the other Alpha, leaning down to lightly nip at the other's scent gland, sucking even more marks into the other's skin. This act caused Reborn to let out another moan causing him to be even more aroused if possible, his hole twitching in want. His entire being desired for more, more and was screaming Alpha, Alpha mark me, take me. The quick pace that Tsuna kept was driving him insane with the relentless assault of pleasure on his senses.

Even the slightest moments had the hitman moaning loudly into the air. The pleasure was all-consuming and entirely damning. How would he ever be able to recover from this? There was no way he would never be the same again after this. He was completely and utterly ruined for any other person, and he was completely fine with it.

The Alpha in Reborn was purring in acceptance and happiness, instincts quelled under the other Alpha. He had already found a home in his Sky, and his Alpha instincts were following suit, accepting the other as his mate at the easy way the other was able to dominate him and give him pleasure.

The amount of pleasure that Reborn felt was burning. It felt like the Sky was pressing him and filling him up full of Flames. The pleasure was scorching in its intensity. Reborn was entirely consumed with the pleasure and completeness he felt, and he wanted to dwell in the pleasure, but at the same time it was overwhelming.

"Alpha," he moaned loudly, tears gathering at the corners of his eyes, overwhelmed. The hitman barely heard Tsuna groaning as he gave a thrust that was slightly harder than the pace he had set before, hands tightening on Sun's hips. The added pain was mixing with the pleasure, only bringing the overwhelmed Sun to greater heights.

Reborn instantaneously let out a scream and jerked as the Sky gripped his throbbing member, tears spilling from his eyes as he was pumped in time to the other Alpha's thrusts. The precum that was building up at the hitman's slit was already overflowing, dripping down and causing the Sky's hand to be even slicker, adding a whole other dimension of pleasure as his gland was abused in time to being pumped. The Sun's hole tightened almost painfully, pleasure spiking to completely uncharted territory.

Reborn clutched onto his Alpha as he was mercilessly pounded into, body jerking involuntarily. The hitman lost all hold on himself, screaming, "Alpha, please!", causing Tsuna's eyes to darken even more.

Tsuna watched his lover's descent into incoherency and pleading with half-lidded eyes, feeling the satisfaction at being able to break his Sun's defences down letting him see the hitman's vulnerable side.

Reborn felt the tremendous amount of pleasure washing over him like a tidal wave, continuing to build higher and higher before his Alpha suddenly pressed his claiming mark into his scent gland, bonding them for life. The sudden pain and pleasure made him scream as his body inevitably and instantaneously gave into the pleasure once more, spilling himself in his Alpha's hand. The Sky growled low in his throat, thrusting a few times before pressing his seed deep into his exhausted lover's hole. He enjoyed the sensation of Reborn's still twitching hole for a few more moments before pulling out before his knot formed.

Reborn breathed deeply, gasping as he was suddenly left empty. He directed a tired but puzzled glance at his lover. "Not going to knot me?"

Tsuna smirked, sucking and licking the hitman's neck that was still bleeding sluggishly. "Not yet," he murmured seductively into the other's ear, "the night isn't over yet."

Reborn gasped as he felt the pleasure jolt through him like a lance, raking nails down the Sky's back. The bonding mark was still new and extremely sensitive.

"But first," the Sky said, pressing kisses to the other's neck, words of love unspoken but felt all the same, "bond me back."

The hitman let out a groan as heat returned to his groin at the other's words, leaning up and pressing his teeth into his Alpha's neck, the skin giving way as he bit down. The Sky groaned as his Sun pulled away. In a sudden burst of speed, he pressed the taller Alpha back down onto the bed, pushing his member back into the other's tight heat, ripping a moan from the hitman.

The Sky licked his lips at the delectable sight the taller Alpha under him made, all rumpled and sweaty, and pulled out, only to thrust and hit the other's prostate with dead-on accuracy, tearing another scream from the hitman's lips as it suddenly dawned on the hitman that this was going to be an extremely long and pleasurable night.

Reborn cursed as he moved, the pain throbbing from below as he remembered everything that happened last night and continued well into the early hours. His feet just touched the floor and he was about to get up when he felt hands wrap around his midsection. He felt his Sky nuzzle into his neck, pressing against the newly made bonding mark, giving him spikes of pure pleasure at the action.

"Good morning," came a low rumble, pressing a smirk into the hitman's neck.

The Sun felt the stirrings of embarrassed pleasure, dusting his cheeks a light pink. He would have suppressed it had he been with anyone else, but he trusted his lover, and with what they had experienced last night it was already too point in hiding his vulnerabilities.

"Morning," he replied, and when the other released him, he headed towards the bathroom, catching a glance of himself in the mirror.

His skin was littered with bite marks and hickeys as evidence from their late-night love making. His inner Alpha purred deeply in satisfaction and pleasure at the thorough job his Alpha had done staking his claim. He brushed fingers lightly over some of the marks, lingering on the bond mark on his throat, and caught eyes with Tsuna through the mirror. The Sky looked unbearably smug at the attention he was giving the marks left behind on his body.

"Maybe I'll heal them up with my Sun Flames," he said, face completely serious. "Want me to heal up those marks on your back too?" he continued, face the slightest shade of pink that he had been the one to leave those on his lover's body instead of receiving them for once.

The smaller Alpha's smug expression immediately dropped as he growled low in displeasure, stalking over to press close, immediately starting on sucking even more hickeys into the arrogant hitman's skin.

The hitman gasped and groaned lowly, anticipation building. He flashed a smug smirk before he hid it while his Sky was still distracted. I've still got it.