Eh, I don't know. No need to get so upset at my comments, just thinking aloud here and I'm still pretty early in the game (didn't unlock second row of girls, affections in the 15-30 range, main events for Chapter 1 around midway mark).
I had to do Futaba's events because of the way the game is structured, right; you can only unlock other events by doing all girls, literally. Then I got intrigued by the Strange Notebook thing and wanted to pursue that. Then out of nowhere - Sex Event!
And then of course, Selebus gets his kick lecturing the player for being an awful degenerate and shit, but it fell flat. It doesn't make sense In-Universe and even out. I mean... ok, obviously the thing about 99% of all males up and vanishing is a handwavy, hyper convenient contrivance, but if it's true in-game, poor Futaba is NEVER going to experience anything remotely sexual or romantic with a male in her life. She'd have a hard time competing with the other girls in a normal setting as is.
And it's particularly weird that the protagonist - being the callous, self-serving bastard he is - does not realize any of that. He IS doing Futaba a favor. He IS propping her self esteem, not "destroying" it. He is doing that because I - the player - have "no choice".
There's this undertone that male sexuality is inherently destructive, dirty, corrupting, and that it's impossible to have casual, no-strings, fun sex without it somehow "destroying" women in some magical way that I can't really fathom. And of course, high-school girls are pure angels who have no interest in any of that.
I don't think that's a healthy outlook to have. I'm one to talk, I know, but I think Selebus has his own set of hang-ups to look into.