Rinko Yoshitaka

Rinko is a serious, strict, and nerdy teacher. Arase is her easy-going, snarky, Book Dumb, slacker of a student. Despite this they love each other very much and have been dating since before the start of the series. Rinko loves sappy romance dramas but doesn't want anyone to know about it. So much so that she travels some distance to rent movies so that the locals don't find out. Rinko has very bad vision. Arase and Rinko are actually in a committed relationship, something they struggle to keep secret while Rinko tries to prevent things from getting too physical until Arase graduates.