Ai Sayama takes on her first gal role! Ai, who has an overly free-spirited personality and a strong sex drive, is a single mother who loves bodycon dresses. Her serious and modest daughter, Sachiko, has grown up learning from Ai's example and now has a boyfriend. She has been keeping it a secret, fearing her mother would make fun of her, but her boyfriend, Tanaka, came to visit while she was away and found out. While talking to Ai, who is wearing a sexy bodycon dress, Tanaka, who is still a virgin, gets an erection and she starts to play with him...