Burdened by a massive debt, Tomoe accepts a clandestine position as the official paramour for the students of the prestigious Seika Girls' Academy, where dating is strictly forbidden. Tasked with providing sexual relief to the repressed students, Tomoe begins his tenure by attending to Kisaragi, a prim student seeking a physical escape from the suffocating pressures of her academic life.
The protagonist is paired with Katou Mio, a star sprinter with a daring exhibitionist fetish. To relieve stress before a major competition, Mio requests a live-streamed sexual encounter, forcing the protagonist to perform in front of a global online audience. After their intense session, Mio secures a first-place victory in her race, leaving the protagonist bewildered by the eccentric desires of the students at Seika Academy.
Tomoe and Mio treat the protagonist to a special birthday date, starting with a risky shopping trip for swimsuits and culminating in an intense threesome at a hotel. While the protagonist struggles to remind himself that his role as the academy's official gigolo is merely a means to pay off his debts, his celebrations are cut short by the arrival of Student Council President Louisa Richter, who demands the immediate abolishment of the school's secret paramour system.
Student Council President Louisa Richter, who harbors a deep hatred for men, attempts to bribe Sao into helping her abolish the school's paramour system. When Sao refuses and defeats her in a series of sexual wagers, Louisa reveals her emotional trauma and longing for fatherly affection. Through intimate roleplay, she finds unexpected solace in Sao, softening her heart and reconsidering her crusade against the academy's secret system.
The official paramour of Seika Girls' Academy meets with the principal to report on his recent progress. Through a series of flashbacks, he recounts his passionate and varied encounters with Tomoe, Mio, and Louisa, demonstrating his dedication to satisfying the students' deepest desires. Impressed by his performance, the principal praises his skills and suggests expanding his repertoire to further assist the girls.
The protagonist joins Louisa, Tomoe, and Mio for a vacation on a private desert island, where the girls engage in a playful competition to see who can make him climax first. After resisting to avoid showing favoritism, he eventually gives in to their advances, leading to a liberating and passionate group encounter in the tropical paradise.