Akane Misaki has started living alone. She feels uncomfortable because there’s a lot of luggage in her room, but she thinks it’s because the room is small and begins to change her clothes. After a while, the door opens, and an unknown man appears. The man’s name is Ken Hasama, and according to the landlord, they ended up sharing the room due to a contractual error. The room will be available in a week, and until then, Akane and Hasama will have to stay together in the same room. It’s an unfavorable situation for Akane, but the first evening goes by without major issues. By chance, they end up sleeping together on the same futon, but Akane had difficulty falling asleep due to the unusual situation. However, from the adjacent room, a glossy voice reaches her, and even the inexperienced Akane can tell that it’s the sound of a couple having sex. While listening to the voices, Akane’s hand goes between her legs, even though Hasama is sleeping next to her.