Sano and his classmate Kanna, known as the cutest girl on campus, both sign up for a high-paying part-time job, only to discover they are working for an adult film production. While Sano is initially hesitant, Kanna reveals her hidden obsession with eroticism, leading the two to share an intense sexual encounter. Now bonded by their secret, Kanna eagerly embraces her new role in the industry.
Sano and Hiiragi spend the day filming a showcase video, blending scripted date activities with their growing attraction. The shoot culminates in an intense encounter at a love hotel, where Sano strives to make Hiiragi fall for him personally rather than just physically. In the aftermath, Hiiragi confesses her love, solidifying their relationship beyond being mere casual partners.
After accidentally discovering that his crush, Amamori, shares his secret obsession with masturbation, Nitta is shocked to learn that she has never actually experienced an orgasm. Amamori asks for his help, leading the two to engage in a series of intimate experiments to satisfy their mutual desires. Bonding over their shared hobby, they agree to continue their exploration of pleasure at Nitta's home after school.
After a risky encounter during math class, Amamori and Nitta take their relationship to the next level at Amamori's empty home. The pair finally engage in full intercourse for the first time, spending the entire night exploring each other's bodies. The following morning, a satisfied Amamori updates Nitta's records and eagerly suggests they repeat the experience.