It's interesting, but I don't have anything to say about this just yet except for some related things--and they start with this: if he chooses the androgynous ones--either the gamer or (especially) the teacher, that'd constitute an instant drop.
I can't say I don't know how people don't get tired of female (or ostensibly female) characters who could easily pass as male--a lot of the guys out there who like them are either in the closet or simply out; that's just how a lot of males are, these days. It's truly irritating how you can't easily find a manga these days without an author trying to surreptitiously (though, if you have working eyes and a functional brain, you can see it--especially after reading enough manga with this kind of content) sell you, a male reader (the intended audience of a shounen manga like this one; seinen aren't exempt either) homosexuality through androgyny and the comparative poor treatment of femininely beautiful characters.
The teacher, in its first appearance, clearly and unmistakably looks female. It even was even drawn with a visible bust; if anyone can say anything about the angular shape of its face, only two pages later can you see every major character drawn with similar faces. The author then just goes and says, "That 'girl' you saw is actually male. Or maybe not. Teehee~" Seriously: if you, as an author, want to write a story about a guy who likes guys--whether they pretend to be girls or not, whether they look like they could be very young boys in drag or not--just do that and let your story be classified as yaoi, then. Why try to sneak it in like this?
And to be clear, I'm not referring to how the three girls looked like boys when they were young--though that should clearly illustrate what I'm saying about how these creators constantly push lolis (which do not have a barrier to entry--they show up everywhere) and androgynous/masculinized women in every work, in this era.
