I mean, it's so common in BL that everyone and their dads and grandads be gay, so you see a guy with someone else and you'd immediately think they are a man as well lol
I'm really curious as to why author decided to give them a 4 year time skip, why wasn't only one enough. Honestly it feels like kind of a stretch but I hope it's going to be executed well.
no way he gave him something that hasn't been proved as safe... hope he accidentally takes it and turns into an omega