Hayami Takurou transfers to Saint Arcadia School and moves into a dormitory populated almost entirely by women. While he initially enjoys the attention of his new classmates, he soon discovers a darker side to the institution when he is abducted during a fake physical exam. He learns that due to his father's financial debts, he has been claimed as a "tribute" by the hedonistic Social Club. To escape their immediate control, Hayami hastily joins the Paranormal Studies Club, sparking a rivalry between the two factions over his ownership.
Hayami continues to be targeted by the predatory Social Club, which uses its influence over other school organizations to manipulate him. After a compromising encounter with the Tennis Club, Hayami is forced to join the Social Club to save Otokawa Saori from torture. Once recruited, he becomes a subject for the club's hedonistic experiments, serving as a tool for their pleasure.
After Maiko orchestrates a chaotic distraction to humiliate the Social Club, the tide turns when Morimoto Leona discovers Maiko's involvement in the hacking and seduction of the staff. Seeking retribution, Leona and Reina rally a group of teachers and students to launch a counter-attack. The conflict culminates in a confrontation where Maiko is targeted for a brutal "punishment," though she remains provocatively unfazed by their attempts to break her.
After Maiko uses a fake fire alarm to disrupt the Social Club and humiliate Morimoto Leona, the tide turns. Upon discovering Maiko's role as the mastermind behind the system takeover, Leona teams up with Reina-sama and several faculty members to enact revenge. The group ambushes Maiko, subjecting her to a series of ruthless and degrading punishments to pay for her mischief.
Araki Madoka exposes the Morimoto family's sinister harem service and the existence of a secret list used to blackmail students. Driven by her own traumatic experiences, Madoka recruits a team, including Hayami, to steal the list and restore justice. While preparing for the mission, Hayami seeks medical help from Kawahara-sensei, who reveals her own struggle against the school's cruelty before subjecting him to her own desires.
A daring infiltration of the Morimoto mansion to steal a secret "slaves list" turns into a nightmare when the team is betrayed by Kawahara-sensei. Despite the capture and torture of several members, the group eventually manages a narrow escape. However, their victory is short-lived as they discover the stolen evidence has been ruined by water, leaving the sinister organization's secrets intact.