my dude if there is a student counselor who is trying to molest girls by threatening them via a secret underwear inspection THE WORST THING YOU CAN DO IS JUST LET HIM GO
His/her best friend is just a good person. Good people doing good things is attractive, so yes, that's how "popular" people act. Hopefully MC learns that lesson rather than thinking pretending to be nice, aka Nice Guy syndrome, will net him girls