Ishikawa, who runs a cram school with his wife, decided to let students with poor grades stay at home and teach studying with his wife, Yuuri. However, the students are interested in the fascinating body of Yuuri, a teacher with huge breasts. The students who sneak into the couple's bedroom at night play with Yuuri's body as much as they like, and gradually become addicted to Yuuri Hako's cheeks!
