Ishikawa, who runs a cram school with his wife, decided to let students with poor grades stay at their home and have his wife, Yuri, teach them. However, the students' interest was drawn to Yuri's alluring large breasts… Night after night, the students would sneak into the couple's bedroom and do as they pleased with Yuri's body, gradually causing Yuri to become addicted to the boys' penises!
