It goes M now ;p Enjoy!
Renji nuzzled the curly black hair on Byakuya's groin, his hands carressing the noble's thighs. Byakuya let out a groan the moment his cock was engulfed by Renji's hot, wanting mouth. He was close to coming, his manhood throbbing against Renji's tongue. Renji licked the leaking head and felt Byakuya's hand tugging at his ponytail. It soon went loose, and Renji smiled around Byakuya's cock, knowing that the noble got very aroused when he could untie his lieutenant's hair himself. And the view of Renji with his hair down was one of those for which Byakuya stayed awake at night just to admire it.
Renji pinned Byakuya's hips to the desk and gave his cock a gentle suck. The captain moaned so passionately that Renji realised his own raging hard-on was still trapped in his clothes. Trying not to let Byakuya's cock out of his mouth, he untied his hakama and moved the fundoshi a bit to finally grab a hold of his penis.
The sensation of cool air on hot skin was so intense that Renji growled around his captain's cock, which caused a sudden low thud. Renji looked up to check if Byakuya was still conscious, but was at once reprimanded:
"Don't stop! Do that again…"
Byakuya, as he soon realised, leaned backwards too much and fell onto the desk; the low thud was the sound of his back hitting the wooden surface. Renji, relieved that he didn't cause a faint, immediatelly produced a series of simillar purrs. He pumped his own cock a little not to go insane with the sounds that his lover produced. Who knew the Kuchiki heir could groan and purr like a cat in March?
After a particularly strong groan, Byakuya jerked his hips upwards, letting out an almost silent moan. Renji knew him too well to know what that meant. He sat back, still jerking Byakuya off to let out all the white liquid that spilled over his chest and face.
Byakuya was lying on the desk, his chest heaving. Renji, with his own cock still being fondled by his hand, marvelled at the view of his captain in a state that could oly be called: beyond his control-limits.
Soon, Byakuya sat up, his body glistening with sweat, face flushed and eyes half-lidded. His kenseikan was askew. He was so hot.
"Renji", Byakuya spoke in a husky voice, "Your shihakusho…"
Renji looked at the white mess on his clothes. He didn't realise he still had them on.
"Ah, never mind that. It needed mending anyway", he replied, watching with satisfaction as Byakuya's gaze lowered to his cock. The noble licked his lips, but Renji had decided he would just let him watch.
"Enjoy the show, Byakuya", he groaned, pumping his shaft. He knew that Byakuya liked the view of his cock, maybe even more than of his hair being loose. It was never a problem in their relationship that Renji's penis was bigger. That way, he could give Byakuya more pleasure, and it also worked the other way round.
He was sure that Byakuya imagined just those wonders that Renji could do with his big cock when topping. The noble's expression and pose said that his 'self-control-personification' mask was away, revealing pure lust and love.
"Come for me, Renji", he whispered, seeing that Renji was close to the egde. And he indeed was; his cock soon shooting out streams of semen, coating his hand.