I compiled some from the list which might be what u are looking for. Most of them have fucked up themes
https://www.mangago.me/read-manga/save_me_will_you/
https://www.mangago.me/read-manga/sweet_heart_trigger/
https://www.mangago.me/read-manga/if_you_hate_me_that_much/
https://www.mangago.me/read-manga/paper_flower/
https://www.mangago.me/read-manga/color_recipe/
https://www.mangago.me/read-manga/dominion_vs_roll_short_line_bridle/
https://www.mangago.me/read-manga/my_little_inferno/
https://www.mangago.me/read-manga/the_beast_must_die/
Here yandere /psycho / lover list -
https://www.mangago.me/home/mangalist/1694666/
I'm looking for bls where one of them is quite literally insane like in miscreants and mayhem or in checkmate. Thank you(⌒0⌒)/~~