https://www.mangago.me/read-manga/head_over_heels/
Nobody is in their right mind in this one...
try digging through, they aren't exactly psychotic, more sociopath, and obsessive
https://www.mangago.me/home/mangalist/1090462/
https://www.mangago.me/home/mangalist/1038439/
https://www.mangago.me/home/mangalist/927142/
Do we got any psychopathic male leads