Soon after moving in, Tomoki spends a night in agony hearing moaning from the next room. However, when he finds out that the person living next door is a married woman, Yuka, he can't hide his excitement at her sexiness. Once again, unable to resist the moaning he hears from next door, he sneaks a peek... There he sees Yuka writhing in agony as she masturbates. Tomoki peers intently, but when their eyes meet he panics and runs away. However, the next day, Yuka visits Tomoki's room with a smile on her face as if nothing had happened...