i was confused too but it was a good story
Kohaku has no gender what so ever, not a guy or a girl, so you can refer to kohaku as a he or a she, because technically... there is not term in most languages to refer to someone that has no gender.
Kokuyo is genderless, but in the sequel manga, Legal Drug, he lives as a gay man.
I don't think it matters because the angels don't have pacific gender but as the person above me said he lived as a man in legal drug
I'm confused because is kohaku a girl or a man witch is it geez is kohaku a girl or a man please tell me im so confused *grunts* it keeps saying he or she get it right but on the other hand this is a good manga please read it thank you