Etsuko, a single mother who raised her son Daisuke on her own, continues to discipline him strictly every day even now that he's grown. In front of her friend Kenji, she casually bares her buttocks and mercilessly spanks Daisuke without hesitation. Unfazed by Daisuke's embarrassment, Kenji watches the erotic punishment with envy. Having never known his parents, he has long harbored a deep longing to experience being scolded. As Kenji pleads with Etsuko, "Please punish me," she gives in to his request and begins administering her own erotic discipline.