Nonton Hokenshitsu de Aimashou (1999) Sub Indo di MovieXXI

Shino is a student at a private secondary school. When she starts to feel unwell during lessons, she goes to the school infirmary. After the teacher in charge leaves the infirmary, Shino begins to enjoy the thoughts of an older classmate she secretly loves. Meanwhile, that very same classmate enters the infirmary with a friend to have fun with her on one of the beds. Shino manages to hide under the bed just in time to witness all the events that follow. When the teacher returns, the lovers are trapped on the bed, which is only separated by curtains. A sports teacher, who is blackmailing the teacher, then finds the lovers, which is why the situation escalates completely – even Shino is forced to act...