Machika Otokawa (Mai Fukagawa) loses her future lover, Yukito Hatta (Yuta Koseki).. Sawako Fukai (Shuri), Yukito's ex-lover, appears before Machika, who is at a loss.. By chance, Sawako ends up living with Machika.. Machika's family welcomes the cheerful and thoughtful Sawako, but the voluptuousness and madness that Sawako occasionally shows spreads like poison to Machika's family and surroundings.. Kensuke Otokawa (Sota Ryosuke), Machika's younger brother who is attracted to Sawako's bewitching charm, Shinji Otsu (Kohei Shoji), a detective who approaches Machika, and Nono Igarashi (Hirai Amon), Kensuke's art school classmate, a reporter Kazuomi Makihara (Kazuya Tanabe), who suspects Machika, is quietly creeped out by Sawako's madness.. Why does the crazy Sawako target the people around Machika one after another…?

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