Aika, a mother who lives with her husband and her son, Junya. One day, Junya breaks his arm in a fight with her friend, and Aika starts taking care of her son who needs help. However, Aika is conscious of her son's body, which is growing into an adult, at that time, and she involuntarily starts her innocent son's cock. Then Junya can no longer suppress her interest in sex... Aika feels responsible for her, and this time she teaches her the ABCs of sex firmly with her own body as her mother...
