A director goes to a girls' bar in Tokyo where a poster girl who said she was interested in AV after being introduced by a male actor works, and secretly films the bar and the girl. She works hard and is very fun to be around, so they drink together and hit it off. Mayumi, who is curious about the AV director she is meeting for the first time, ends up being persuaded to go home with him that very day, and they have sex in front of the camera for the first time! She takes off her clothes and is shocked by the real Amateur sex with the busty girl with a slim waist!