After a decade, Sakura Aya returns to her high school - this time as a teacher. In the past, she was mercilessly teased and bullied for her large breasts. As she steps back into the premises, she's greeted with an unsavory sight - an illicit sexual encounter in progress. To make matters worse, one of her students, Yoshizawa Shinichirou, has been absent for days due to his sick father. Taking pity on him, she brings the troublemaker home, unaware of his interest in her body. When she points out his lack of a sense of danger, he responds with confusion.