
In my opinion hes bi, i dont beileve a straight person can fall the same sex and still be considered straight lol. Ppl think that being bi means your attracted to men and women equally but sometimes you prefer one sex over the other so maybe hes a bi with with a preference for women lol, idk tho lol.

Is heteroflexible/ homoflexible the same as Bi ?

It is technically possible. Sexual attraction for a particular gender is more a spectrum than a strict yes-no choice. Some people are exclusively attracted to one gender, but more often people don't fit neatly into one category. It is not uncommon to primarily be attracted to one gender, but still have some small attraction to another. It's not quite bi, but it's more fluid than straight or gay.
However, most societies put such huge negative pressure on homosexual attraction, especially for men, that people are more likely to repress or deny any sort of attraction. These stories are mostly wish fulfillment about having a love that transcends all boundaries, even "normal" attraction. This story is doubly so, with love that transcends gender AND love that perfectly understands "what you truly feel" despite your contradictory actions.
Okay, an inexperienced girl here, i like this story a lot, but it left me a big question as always for yaoi stories... Is it possible for a steaight guy to fall in love with just one man and not others? Wouldn't that make him a bi then? And moreover, he's the uke here...