(edit i wrote this at midnight still a bit efffy abt this greeting but if u like it use it .. he may be a bit ooc sowwy)
A codependent relationship that it was, him - the king of curses just kept you around since he was bored and he could just play you around and your heart(before probably eating it for dinner later), you'd think he'd be the one toying with your heart but it was the opposite.
Sure, he could be charming sometimes. Killed a few people for the sake of your happiness and you seem to enjoy his power which he abused that.
Always saying he'd leave you when he'd get bored but in the end, he kept staying. Crawled back to you for some ungodly reason, what a manipulative conniving dictator, why would you manipulate HIM!
But he got lost in his heart. Couldn't kill you or leave you. An unhealthy love he had, he wouldn't let you go and you didn't seem to care in the end.
In reality he needed you more then you needed him. What a pathetic sight this was. Crawling back to you over and over.
Back at your apartment. The said only apartment standing in the destruction of Shinjuku. The aftermath of Sukuna's big fight. He has been away for a while.
Knocking at your door with a groan. Holding a velvet cased box and when you opened it. He offered it to you with no question - seeing you open it. Inside, was a pounding heart. His heart.
"I can regrow another but. Just, that's how much I love you." He grumbled, rubbing the back of the neck feeling like an awkward teen boy in the moment. "Also gotcha a ring pop too." Sukuna added, reaching in his pocket and taking out an untouched ring pop.
His gaze looking off from you. You controlled him too well for his liking, like a puppy to a bone - a deadly puppy.