Sho-chan skipped school without permission, prompting his concerned teacher, Reika Hitomi, to visit his home after class. However, when she arrived, Sho-chan was home alone with no parents around. Intrigued by the teacher's ample breasts visible through her shirt, Sho-chan suddenly clung to her body in a childish, affectionate manner. Startled, Reika instinctively pushed him away, but in doing so, Sho-chan dramatically fell backward, pretending to injure his leg. Sensing her guilt over harming her student, Sho-chan seized the opportunity, exploiting her vulnerability by subjecting the teacher to lewd pranks and increasingly humiliating games—escalating into a twisted cycle of torment and degradation.