Look, this dumb conversation comes up with this game so often because it so blatantly points out that something like gay or straight is woefully pitiful when it comes to describing actual sexuality. Those categories can't handle any nuance at all.
This is what it boils down to: when guys (and it's -always- guys) want to know whether something is "gay" or not they're not actually worried about finding out exactly how heterosexual something is. What they're really wanting is some strict delineation between "faggy" and "masculine". Faggotry is as old as masculinity is; it's guys arbitrarily declaring some things to be effeminate, sissy, for pussies &c and so it's -very- important to define what those things are even knowing they're stupid and arbitrary. The game itself even plays off of this to a large extent: Hiro can "fall" from masculinity and become a total effeminate sissy faggot, he can try to fight against the evil forces attempting to foist this on him and prove his masculinity, or more likely (and this is the most interesting thing about the game) he can discover that these things aren't nearly so strict and rigid as they first appear and work out some kind of balance between keeping his dignity and acting kinda shameless, asserting his strength and letting others assert theirs over him, acting manly and acting girly, being a hero and being a slut. There's androgyny.
Yes, this game actually kinda has a socially relevant message at its core and it's one people could stand to learn.