
I find most luck with Korean gls when it comes to this, since the Japanese ones are usually soft and fluffy while the Chinese ones are unfortunately restricted by censorship. I love Sea of June because the FL is a mermaid who is obsessed with the MC and would kill for her. There is Bad Thinking Diary, and although the plot was kinda mid, I really liked the art style and how toxic it was at the beginning (plus the FL is hot asl). Trash Flower is also a good one because the FL is a possessive rich girl and gives red flag vibes. Finally there is Lady Black is Depressed, which is a historical love triangle and both of the female leads are quite obsessed with the MC. Hope this helps! :D
Ahhhhhhh this is the yuri manhwa that reads like a yaoi manhwa that I've been waiting for..... I hope they get more and more toxic, and Daniela gets a little pathetic along the way too