To add a little to what
thebruneitor said, the way this games handles relationships changes between girls.
For example,
Karen (the blond one) CAN cheat on the MC if you play wrong, if you don't want to you can make sure she doesn't cheat on you (so basically don't be dumb and she will not fuck anybody else, tho cheat is a strong word in this case, she's kind of dumb and will do anything sex related if you ask her to, so yeah... watch out for that).
Meanwhile
Hana (pink hair bitch) WILL ALWAYS cheat on the MC, there's nothing you can do to change that (feel sorry for the people that like her lmao).
Also the 2 other girls
Margaret and
Frost CAN'T cheat on the MC no matter what you do (sadly they will also have less scenes but the dev is already working on new scenes for updates and such).
I think that's pretty smart, in any case the way this dev handles NTR is so lighthearted in comparison with other artist, so even people like me that don't like it can read his dojinshis.
But for real, I am a Margaret fan for sure, I wanna fuck that gremlin so hard.