I loved the way her sempai called her (finally) on her bullshit. That said, sempai was almost as bad. Mayu seems pretty straight-up bisexual, I think. So Monayo won a fair, head-to-head contest in this one. And the great mystery of why Japanese stories always have them breaking up, forgetting their friends, etc. the instant graduation happens is finally solved. They're all neurotic, and they create fantasies that prevent them from being able to phone each other or go to lunch, etc. It's a nation of stubbon tsun-tsuns.