https://www.mangago.me/read-manga/freeze_it_will_stand_if_you_move/
Found it!!
As everything in life it happens to be way more interesting in my memory than in reality... but anyway if u r into omegaverse and this crazy premise, enjoy! reply
My dad just got divorced and briefly after end up marrying a man who just did the same and whose son is exactly like him. I'm just like my father, I don't want to feel attracted to my now step bro.
I read that yaoi too long ago. It is a webtoon,nd full colored if I remember well. Anyone knows the name?