So this game is BS. Very early on the MC is raped by a young woman, presumably his sister, right?
He should have gone to the police immediately and demanded they go to the scene of the crime right away to gather evidence. He should also demand that they gather evidence from his body, there would have been hair and skin remnants left on him. Vaginal fluids and so on too.
Screw the shame, if you want them caught and punished you have to move while the evidence is fresh and any BS interference can take place. Be as loud about it as possible too, go to the media, complain to the school. Complain to everyone.
Then they either have to act against the criminals or move to silence you.
And it would look really bad for a school that’s just about to go Co-Ed if the first boy thats been admitted there, the Principals son no less, was immediately raped by some of the girls there.