Slacker Ichiko gets into a fight with her younger sister and begins to live on her own, working the late shift at a 100 yen shop. On her way home, she passes a gym and meets boxer Kano who trains there in silence...
Yoshika has had a crush on Ichimiya, whom she calls "the One" since she was in middle school. Now, a 24-year-old salarywoman, her all-consuming fixation has prevented her from even considering another candidate for boyfriend until an office colleague asks her out.
A novelist receives a letter from a female university student named Kubo about strange sounds that emanate from a room in her apartment. They begin to investigate incidents involving former residents, and eventually discover the shocking truths lurking inside the building.
