Sex in manga isn't inherently bad, obviously. It just feels so juvenile here with how it's depicted. I mean, this is actually just a hentai manga plot except that we don't get to see anything explicit. This scene reminds me of the very start of the Gate S2 anime where the prince dude is fucking the bunny girl and telling her "Scream! Scream Harder!" as like, the first line of dialogue, and I'm just thinking to myself, "How am I supposed to take this guy seriously after that?" This main character has the same issue where I can't take him seriously at all. So I can't sympathize with his issues. It'd be like trying to sympathize with Kim Jong Un.