No, statutory is the one where one party is too young to consent. Even if both parties consented as far as they're concerned, the younger one's consent doesn't actually count legally.
Im sure he didn't do shit to her, its a romcom with some drama Ayame would already lose but not being "pure", its either the other girl making douche punish her and tell the lie or she is in love with the douche and don't see his bad side
That big guy might just be bluffing i readed ch. 0 pg. 10 again and the big guy said “I’m sure you’re not a virgin, so stay put” but i’m not sure if the trans is correct but it’s possible that the TL just made a mistake in translation