Red Mansion
https://www.mangago.me/read-manga/red_mansion/
my ULTIMATE freak for freak couple
Please Confine Me! It's a short story though. I would also recommend Punch Drunk Love. It's not really toxic but they're freaky and hilarious.You can try also Kemono Asobi. Though it has a little violence at first chapters but I think it's tolerable. They are one of my toxic couples out there. ╮( ̄▽ ̄)╭

Any toxic x toxic bl’s? And I do not mean slightly toxic x toxic, I want them to be equally insane. Like ‘pay attention to me’ where one revolves their world around the other and literally only focuses on them and is possessive, and the other wants their partner to give them all their attention and only focuses on them. So they match their freak.
No gore, horror, abuse, rape, ect.
Preferably a manhwa, and I have no opinion about smut so I don’t care if it has it or not.^^
(If it has smut, don’t recommend any ones where the characters are underaged when doing it)