SDDE-508 "Seito Shokun! Bring your mother to tomorrow's health class instead of a human model!" Kimika Ichijo

There is a special class held at the school ... It is [learning the internal structure using the mother's body instead of the human body model]. Kimika (53), who was selected as a model from several mothers, decided to devote herself to her son's advancement to school. Then, like a mannequin, he killed his emotions and revealed his secret part in front of the students ...