I’m starting to think that the girls are all relatively normal, but it’s the social norms that are messed up. Cause normal males probably hide and stay away from all girls due to fear.
So what Sou is doing with greetings and smiles, isn’t just politeness like in our world. In their world, a man doing that action is outright seduction basically.
Like if a woman in our world hugged a guy and grabbed their crotch. Their world, guys doing something that doesn’t indicate outright fear is socially equivalent to that.