Yosuke Kawahara begins a part-time job at a remote nursing facility in Tanagokoro Village, but the peaceful mountain setting masks a disturbing reality. After experiencing strange, compulsive sexual encounters with his female colleagues, Yosuke discovers a dark secret: the facility is a place of systemic abuse where powerful patients dominate and enslave the female staff.
Yosuke confronts Aida regarding the mistreatment of Eri, only to be manipulated into facing a repressed truth about his own hidden desires. As Aida orchestrates a series of provocative encounters, Yosuke abandons his facade of morality and gives in to his primal instincts, engaging in sexual acts with Natsuki and Haruka. By the end, Yosuke has completely lost control, falling right into Aida's calculated plan to corrupt him.
Yosuke discovers that the nursing home is actually a laboratory where Mr. Aida uses "D-waves" and secret medicine to pursue immortality through sexual experimentation. After a violent struggle and a devastating fire that ends Aida's reign, Yosuke finds himself as the new master of the women in Tanagokoro Village, where they continue their erotic lifestyle under his control.