
Looking for a yaoi manga i read years ago about childhood friends, the MC liked a guy in his class but the other friend sabotages his relationships or something and would get off from the comforting him after he was hurt. Oh the yandere friend had a sister who was equally messed up and helped him in his schemes XD Please help me out ive been searching like crazy
Kataomoi Opera?
Is it by Harada? I read something that almost fits your description.. but there was no sister. It probably isn't this though.
http://www.mangago.zone/read-manga/suimenka/
Man his family is so wholesome especially the sister. I have a sister and of I found out she was gay id probably torment them by pretending to coincidentally mentioning it and then pretending not to know just to see them flustered. I just realised I'm a trash sibling lol