Mr. Yu who is irresistible for plump ripe fat. Tanaka and Yamada decide to hold a study camp at their homeroom teacher's house... However, Tanaka becomes fascinated by the teacher's wife, Yu, and becomes unable to study. One night, Tanaka, who witnessed Yu's frustrated masturbation, had a forbidden relationship with Yu while the teacher was away. Yamada who knew it threatened and brought it to 3P.
