Responses
https://www.mangago.zone/read-manga/an_uncomfortable_truth/
I think this is what you're talking about but it's not BL or incest. Did you remember wrong or is this the wrong manhwa, XD?
tysm!!! lol sorry abt my mistake I read it years ago and I forgot that it was a psychological manhwa
it's bl and incest, they are kids and the black haired guy is a psychopath, he likes his red haired brother and the red haired brother dies in the end