Well it is possible & even though i'm bisexual,i was happy that yaoi doesn't use that kind of "classificatio"n, 'cause at the end love is love, you can be hetero & fall for a guy but that doesn't make you bi or be gay & fall for somebody of the contrary sex but it's just that person, so why always people need to divide everything?...
Lol but it does make you bi tho, it just means that person has like a 1% preference or smth for dudes and this particular person fell in that. I just dislike it because even though it's literally a manga featuring two dudes as the main leads, it really goes out of it's way to say that they're not gay or bi and just happened to fall for a dude because plot, feels icky to not even have bi or gay ppl in a manga that literally has two people of the same gender falling for each other yknow
This is probably the first manga i've read that speaks about bisexuality and not the "I'm hetero but I love you" shit.(づ ̄ ³ ̄)づ