While Yuu Yagami is temporarily reassigned, Sora falls under the care of Hiyori, a genius researcher obsessed with amplifying male pleasure. Through a series of provocative experiments involving BDSM and sensory stimulation, Hiyori pushes Sora's body to its limits to achieve a theoretical super-orgasm. As Sora discovers his hidden masochistic side, the episode ends with the return of Yuu, who is ready to resume her "care" of the patient.