When he opens the front door, he finds Yua, the married woman who has just moved in next door. She has come to greet him after moving in, but her appearance is far too vulnerable. To his surprise, Yua is not wearing a bra. Her low-cut dress seems to be inviting. Katsu burns that image into his mind and indulges in masturbation at home. Then suddenly, Yua comes to visit. Katsu is in a hurry and makes an unexpected request...