The son attends the high school where his mother works, a passionate physical education teacher known throughout the campus. Feared by all the students as "Devil Chino," she strictly disciplines her son, forbidding him from dating girls or reading adult material. Tired of his mother's harsh rules, one day the son discovers adult toys in her bedroom. Seeing this, he decides to take revenge for all his suffering by humiliating his mother, forcefully urinating on her stern and strong face.