A man is consulted by his niece about something strange about her breasts. When he touches her nipples, she reacts surprisingly sensitively. After he caresses her and develops her nipples, she even lets him have sex with her. The niece tells her friend about how good her nipples feel, but her friend is also curious about nipple development. In a chain reaction, girls who want to feel good through their nipples visit the man's house, and it becomes a hangout spot. 3 people included