(More from the Dark Fantasy Inuyasha AU, if that’s ok with you :) )

Poor Sukuna would be tormented SO MUCH before he finally got his OGkuna form

Sukuna being in constant close proximity with Yuuji since Yuuji would sleep next to him and hug him close during the winter months to keep Sukuna’s frail body warm, and it drives Sukuna insane because he wants to touch Yuuji so badly, but he just can’t in his state

Sukuna in absolute agony having to listen to Yuuji giggle and make out (and who knows what else) with some weak, unworthy vermin in the next room over, helplessly tormented by images of Yuuji moaning and writhing under someone else’s hands, and then having to see all the marks the useless worm would leave behind all over Yuuji’s body when Yuuji comes back to diligently change his bandages as he always does

Sukuna just wanting to immediately die when Yuuji starts blushing and talking to him about marrying some worthless slime who had been courting him in the nearby village

Sukuna constantly tormented by rage, pain, agony, frustration, self-hatred, and deep humiliation because he’s helpless to do anything to possess Yuuji the way he wants to. Because he believe that Yuuji would only ever see him as (in his own POV) a weak, helpless, pathetic thing rather than as the glorious powerful warlord he used to be and as his rightful lord husband. Because he’s helpless to do anything but watch as weak, unworthy vermin steal Yuuji away from him right before his very eyes

Just. Sukuna in overwhelming yearning and torment. Ugh. All those hardships and suffering making it SO MUCH SWEETER when Sukuna finally wins ❤️