Masaya Haraguchi, a young man who moves into an old apartment to live alone for university, falls in love at first sight with a woman named Akana who lives downstairs. However, he soon realizes that he’s not the only one captivated by her…

As he witnesses the eerie and bizarre behavior of the other apartment residents surrounding her, Masaya is struck with fear.

Who exactly is she, and what is her true purpose…?