@SingLove
The MC in this manga is gay. He is a secret close closet kind of gay.
No non-gay guy would refuse a girl that he likes and gets along well with, especially so when that said guy is a single virgin. He needs to make excuses to refuse them. The excuses are, of course, stupid. This is no harem Isekai.
If you haven't already read it, the MC in Mezametara Saikyou Soubi to Uchuusen-mochi would fit your taste. He isn't a player that flirts purposely with girls, but he also wouldn't go beta and refuse a girl that offers herself to him. He also tells them that he likes them too. I honestly was hoping the MC in this series would shape out to be like that MC, but doesn't seem like he ever would. Kind of disappointing, since the story concept of the story is good, but the MC just ruins the atmosphere of it.