After his dream of becoming a baseball player was shattered, Kenta got a job at an apartment management company through a senior colleague. From the window of the dormitory where Kenta lives, he can see the life of the room opposite, and it is his daily routine to spy on the married woman who lives there, Rika. A few days later, Kenta is working on the elevator at the apartment building, and by chance passes Rika on the landing of the emergency stairs. At that moment, Kenta realizes that the married woman he has been peeking at is Rika, a junior from his high school days. Rika realizes the same thing, and the two of them quickly become closer.