At "R", a company that operates massage parlors, female applicants undergo trial massage sessions to deepen their understanding of the treatments. However, during these sessions, a certain prank cream known as ○○ cream is applied, producing an unbelievably intense effect. Women who initially feel shy continue the treatment and, under the masseuse's skilled techniques, end up craving even greater pleasure. They climax repeatedly with exaggerated ahegao expressions, experiencing ultimate ecstasy. In Experiential Treatment #1, the therapist casually misuses ○○ cream, saying, "We do have something similar at our place, but we'll use a different cream for this trial." Women with plump, attractive bodies fall completely under the cream's powerful spell, turning their entire bodies into erogenous zones. In Experiential Treatment #2, the therapist says, "This time is special," and again abuses ○○ cream, generously applying it around the highly sensitive genital area. Under its intense effect, the women begin touching themselves and actively seeking out dicks. In Experiential Treatment #3, some women express discomfort—"Wait... your finger is going inside!"—but gradually succumb to the cream's growing effect. Despite trying to suppress their moans, they end up feeling overwhelming pleasure and even accept creampie aftercare. In Experiential Treatment #4, the therapist says, "I assumed the therapist would be a woman..." to which he replies, "You can leave if you don't like it," speaking harshly. Yet the women can't bring themselves to refuse, and are thoroughly coated with ○○ cream. Their bodies don't lie. As they cry out, "Something's... my body feels so hot... ah!", the therapist's techniques push them to repeated orgasms, delivering the ultimate pleasure experience.