Shoko is a mother with a reclusive son. On this day, her concerned teacher Yokoyama comes to visit the family. Her son still refuses to leave his room. Shoko has no one to talk to as her husband is away on an overseas business trip for an extended period of time. Yokoyama, the teacher, is attracted to Shoko's beauty and tries to get her to come after him. "Your son hasn't attended school enough days and won't be able to graduate if things continue like this, but I, his teacher, can do something about it."...