Though they've been married for several years, the Makitas have not been blessed with children. Although she and her husband get along well, Kaede still feels something is missing. One day, she witnesses the mother of the neighboring Ishino family, known for their education, scolding her son Manabu. It seems she was upset that Manabu is thinking about sex as he prepares for his entrance exams... From that day on, Kaede is aroused by the gushing sexual desire of the virgin Manabu. Furthermore, she decides to take Manabu's virginity without his wife knowing...