Takashi takes a high-paying summer job as a servant for the wealthy Katsuragi family, where he struggles under the oppressive demands of the household and the cruelty of the family's daughter, Saeka. After hearing rumors of a mysterious object capable of manipulating others, Takashi becomes entangled in a series of illicit encounters driven by an unseen force. He soon discovers the dark power of the mansion's dolls, which can control human will and signal a descent into moral destruction.
Takashi continues to use the mysterious dolls to satisfy his desires, but he soon discovers the dark truth behind them. After learning that Nanami is quitting her job, Takashi confronts Mr. Gouda, who reveals a sinister plan to turn humans into mindless servants of a cursed dollhouse. With the help of Shion, who reveals the tragic origin of the dolls and her own feelings for Takashi, the cycle of the curse is finally broken through a fiery sacrifice.