Kyoko Nonomiya reunites with her relative Michiru Gamo after years of separation, bound by a dark secret from their school days. For 17 years, Kyoko avoided Michiru, but now they are fated to meet again. Michiru takes control of Kyoko's company and opens a counseling service, where she manipulates clients' desires—honor, wealth, love—pushing them into despair. As Kyoko becomes trapped as Michiru's accomplice, she begins to idolize the "Evil Girl." What will be the fate of these two, bound by their shared crime?