(Central Underground Prison: Muken)
The two Kenpachi entered the endless abyss of the final prison of Soul Society. Because of the looming war they could not expect a relaxing honeymoon vacation, by everyone else's standards. Considering who these two were, Genryusai figured that what they wanted would be highly destructive and resulting in one or both of them being out of commission if Retsu wasn't a master healer. The final solution was to send them both to the Muken and just let them do whatever. Only the braver members of Court Guard Squads didn't attempt to flee.
"So this is where you trained Ichigo." Zaraki said, gazing into the eternal darkness before him. "Seems spacious."
"Ichigo is training beyond what anyone would normally do." Unohana stated, letting her braid loose as she walked ahead. "Genryusai sees him as his successor and expects great things from him. I was also going to train you here." She returned to her true self, as Yachiru Unohana, the first Kenpachi. "Like Ichigo to Yamamoto, you were the one I knew would succeed me as Kenpachi. After our first fight, I knew I was to one day die by your hand. But then you crippled yourself, weakened yourself to a shell of what you could be. My last fight was to restore my successor. Then you fought Ichigo and changed everything." She looked over her left hand, the simple golden band on her finger. "I suppose you still did take my life, but there will be many more fights for me down the line."
"I can live with that." Zaraki said getting behind her. "I'll kill my enemies, and the enemies of my allies, so long as I satisfy my thirst for combat. I'm actually itching for that rematch, dear." He said with a twisted grin. Yachiru held a similar one as she spun around and stabbed a dagger into his chest, his blood soaking into his clothes.
"Shall we scratch that itch then?" She suggested with a twisted gleam in her eyes. "The only proper way you or I could celebrate our union. Battle. Every time our own blood stains our clothes, we remove it." Kenpachi smiled a savage grin as he back handed his wife away from him.
"I'm getting hard already." He said, pulling of his Haori and Shihakusho. "Though you did get a headstart, I'm not about to lose so easily." He pulled out his chipped blade and charged forward to meet his wife in a clash of sparks. Yachiru met that grin, spitting out a glob of blood. The dance of blades commenced, each strike showcasing their skill. Zaraki was stronger and much more fierce while Unohana was faster and more refined. Her greater skill was countered by his bestial instinct. They never called out their blades as they made their cuts light enough to shed blood. He cut her thighs, she lost her pants. She stabbed him in the side, he removed his bandages. On and on the exchange went before both were clad in naught but their underwear. The held each other in another bladelock, covered in a sheen mixed of blood and sweat, with their arousal apparent to the other. The first Kenpachi tripped her lover to fall on his back before dropping her sword.
"Enough of this playing, beloved." She purred, untying her soiled loincloth and baring herself like a goddess of war. She flicked her hair behind herself as she descended on her mate. "Time to take what is now mine." She tore his loincloth down to reveal his beastly cock, making him growl in primal desire. Already wet from the pleasure of combat, she impaled herself down to the base of his dick, releasing a delighted scream of pain and pleasure from the forced intrusion. She braced her hands on his chest, attempting to catch her breath before riding her successor and lover's other blade. Zaraki growled in pleasure, loving how she squeezed the life out of his cock to the point of being painful, but he refused to be idle. He rose to met her, throwing his face into her chest and worshiping the lone scar on her body. The only mar that marked her as his. She rolled her hips to meet his powerful thrusts, losing themselves in the primal desire of their mating. There was no romance, only instinct and desire. The entire area shook with their explosive Reiatsu as they reached their highs and screamed out their release.
(Squad 1 Barracks)
Ichigo was exchanging sword strikes with Yamamoto, a wooden practice sword against the old man's cane, when both felt the very ground shake out of nowhere. It was enough to give the two pause as they looked down, into the earth where two of the strongest warriors were.
"That's a little disturbing." Ichigo remarked, before to forget what was possibly happening down there.