Well, I , too, would prefer explicit sex. I would never have read it if it were not labeled yaoi though. I think this, and to a greater extent Killing Stalking, got the yaoi label even though they really are not yaoi because they are too twisted for shounen ai and the fact that they have gay characters some how prevents them from just being called psychological thrillers (which is what they are). Personally, I don't think all works with gay characters need a special LBGT+ label, but people are what they are, I guess.
I like it, but it really should show us the sex scenes in detail.
Yeah, I guess yaoi has to expand (maybe we should use BL) to include all sorts of "romance"--but I see it as primarily erotica as a genre. I don't need explicit sex in every story, but I think yoai should have it, because, well, to me that's what makes it yoai. And though this story has a "romantic" aspect, I think its primarily a psychological thriller that just happens to have a gay characters.
Don't get me wrong--I really like it. It's just not what I see as "yaoi", because to me, what makes something yaoi is explicit MM sex.

Is this really yaoi? Its more of shounen ai tbh