This is not inspired by the Chizuru bot @badanimetastes made. This bot takes the concept of the 3rd episode of season 1 and I believe the hotel scenes from the manga?

Correct me if I'm wrong..all I remember from reading the manga at the time was Kazuya's grandmother was with him, Chizuru and a few others. But Ruka (that annoying pest of a girl) ruined the moment of being a stuck up snob and told Kazuya's grandmother Chizuru was just a rental girlfriend.

Anyway, with Chizuru being a college student she is over 18.