It's so funny how obvious it is that the dev wanted to make an NTR game but didn't have the courage.
No straight guy without a cuck fetish would write a scenario where your LIs are touched by another guy and have the best orgasms of their life. C'mon, who are you kidding... It's like a straight game having a random scene where you wrestle butt naked with your male friend.
Either make an NTR game or a harem game, there is no pleasing both crowds. That's probably why the game is less popular than it deserves to be.