He has a point. Your experience doesn't matter when it comes to this game. We know how she acts, and she tells people when they don't satisfy her. The whole phone call thing is an example. If the MC was bad, she'd tell him. But he can make her cum a lot, and he can last hours. She doesn't need anyone else. And she actually loves him which makes sex more enjoyable. That's how it works in real life too, so your experience should tell you that. If you have a connection with the person you're having sex with, you feel better. That's how it works. And the game did have NTR. Just not harsh NTR. It was just the NTR that constantly reminds the reader that the girl has had lovers before and some were better than the MC currently was. That's a type of NTR. And, NTR can have happy endings. There have been examples of that before from other hentai. And, just because the author regularly does NTR, doesn't mean he can't do wholesome stuff as well. Some hardcore NTR authors from hentai comics, do a couple of wholesome ones as well. And vice versa. She tells him for a fact he was the best she's had and that she won't cheat. We can infer she's telling the truth, as she hasn't held back before when telling him if he messes up or if someone else was better than him. She'd have no reason to lie to him about that, especially since they're dating now, and she loves him. Even if someone else in the past was better, why would that matter? As long as the MC satisfies her, which he clearly does, she has no reason to go to anyone else, and therefore it wouldn't matter. In real life, people can have exes that are better than their current partner. That doesn't mean they're gonna cheat on them or leave them for the ex. That's not how it works. So if you're taking real life into account with your experience, that should matter. She's not gonna leave him, and he makes her feel the best, and he loves her for more than her body. They're perfect together.