Office worker Akiko visits a massage salon near her workplace. Following the female therapist's instructions, she undresses down to her underwear and begins the session, but the sensation feels strangely ticklish. At first, she tries to endure it, thinking it might be her imagination, but the tickling gradually intensifies. Eventually, she realizes something is wrong—but by then, it's too late to turn back. Bursting into hysterical laughter, she cries out, "Gyahahahaha!! Wait, this is—this is tickling, you know?! Hahaha!! Stop it!!" Yet the therapist's hands never cease. In the end, Akiko is stripped topless, her hands bound, as an oil-covered tickling massage commences. Will she survive this torment of endless laughter?