I understand, but I want to clarify that this game does not contain NTR or anything like that. The MC is the only boy in the school, and there are no scenes with other men.
The girls' pasts are mentioned solely to give them context and personality, not to show anything that harms the player. You won't see them having experiences with other boys; you only hear aspects of their story that help you understand what they're like.
The intention is for the focus to always be on the relationship between the player and each girl, without diverting attention to other male characters.