Eri, a new teacher, is forced to listen to her student Susumu in exchange for a certain condition. One day, Eri writes the deadline for Susumu's report on the back of her hand in marker after he fails to turn it in again and again. Susumu's mother storms into the school, yelling, "This is corporal punishment!" Eri did it with Susumu's best interests in mind, but her words were not heard...