A public housing complex built 50 years ago during Japan’s period of high economic growth. The neighbors, who have known each other since their parents’ generation, are forward-looking and warm-hearted. In this house where she was raised for 20 years, Aisa engages in indecent acts behind her mother’s back. She doesn’t indulge in luxury, wearing modest clothing and avoiding editing apps. A bright, cheerful, and down-to-earth girl with a good personality, she doesn’t try to shine or stand out. On a weekday afternoon, she has wild sex. The moment she shyly smiles and reveals her unshaven, bushy pubic hair, passion ignites. The thought of her mother finding out makes her wet, revealing her masochistic tendencies. Once she reaches climax, her mind is filled with thoughts of how much she loves and desires a penis, moving her hips eagerly. In a certain mammoth housing complex in Itabashi Ward, a raw gem is discovered.