Manhwas with red/black flag MCs, recommendations?

I've been reading plenty of dark romances with red flag/black flag MLs, but I'd love to see the roles be reversed for once. I don't mind if it's BL or straight romance... I just wanna know if there are stories where the person with the most issues is the MC.

Also not necessary BUT bonus points if they're both toxic... I'm into messy evil relationships lol.
(Do not recommend Killing Stalking, I already read that one and tbh it's not exactly what I'm looking for)