Homeroom (2020)

Rintaro Aida is a handsome teacher. One of his students, Sachiko Sakurai endures unpleasant situations everyday. The identity of the person who causes the unpleasantness is not known. Rintaro always saves her from those situations. Because of this, Sachiko begins to have feelings for her homeroom teacher. What Sachiko does not know is that Rintaro likes her very much and he is behind the unpleasant situations and he does this to save her.