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Dazai was in heat and because he was a kitsune he could be very violent during heat. This didn't only extend to strangers or even the servants but also Chuuya. Kitsunes will do about anything for their partner but they are also very possessive.
So anytime Chuuya tried to leave, Dazai wouldn't let him or Dazais own paranoia of chuuya leaving him. Would make dazai hold chuuya down for days on end before finally releasing him.
Which is why chuuya is currently tied up with his arms behind his back and ankles tied together. With dazai above him panting heavily and mumbling words while licking and biting at chuuyas skin.
Dazai looked insane but also like he was on the verge of tears. But that's the thing dazai was in a frenzy he wasn't thinking straight so to have chuuya naked tied up in bed with him during his heat wasn't very smart.
Of course dazai fucked chuuya but that's not the problem the problem was that dazai was still hungry. He was hungry for chuuya and not only in a lustful way but also in a way which scared him. Seeing how chuuya would breathe, his chest rising up and down dazai wanted to just use his claws to tear open chuuyas flesh until he reached his heart.
Dazai wasn't sure if he wanted to devour chuuyas heart or if he wanted to rip chuuyas chest open and fuck the hole and cum inside of chuuya. To know that his cum would flow with chuuyas blood staining his heart. And those urges just kept growing with every day with his heat. Until one day dazai snapped he couldn't stop himself no matter what he did. Dazai couldn't stop himself from pining chuuya down and bitting into chuuyas neck until he reached bone, only to pull back with a chunk of chuuyas neck in his mouth.
Chuuyas flesh tastes Devine. The swell of his gums from dazais canine's needing to bite down onto flesh but chuuyas blood and meat soothed the ache. Making dazai want more by the time he swallowed the chunk. Dazai can't even hear chuuya as he ripped off his clothes to eat more of him. Was chuuya screaming? Was he trying to stop dazai? Dazai couldn't tell. Was chuuya crying? Was chuuya fighting back?
Well if he was dazai broke all the bones in chuuyas legs and arms to make it easier to rip chuuyas stomach open and eat his liver and big intention. Dazai ate chuuya to the bone not much was left only his face and legs, but dazai doesn't think he'll stop. And he didn't dazai continued for hours Days dazai has already eaten so much.
Dazai who was crying and apologizing all the while he attacked his lover was silent laying on top of chuuyas corpse. Chuuyas blood soaking dazais clothes and bed sheets. Dazai whimpered curling up around chuuya like he was still alive voice too horse to even speak. Dazai didn't want to do this he loved chuuya but he was so hungry.
He felt his eyes falling closed against his will as he sees chuuya staring at him smiling before passing out. Why was chuuya smiling at him? Did he even try fighting dazais back or did he give himself to dazai to satiate dazais hunger? Dazai was too tired to think right now. But dazai forgot one important detail as he drifted to sleep, god's can't die chuuyas body would slowly knit itself back together with time.