Office lady Yumiko comes to a clinic near her workplace seeking relief from lower back pain, hoping massage and stretching will improve her condition. But she soon finds herself caught in an unexpected situation. The masseuse's hands feel strangely "tickle-ish...? T-This is ticklish..." At first, she tries to endure it, thinking it's just her imagination, but the ticklish sensation grows stronger and stronger. By the time she realizes something is wrong, it's too late to turn back. No matter how desperately she pleads, the therapist's hands won't stop. Unable to suppress her laughter, Yumiko gradually has her clothes removed, eventually progressing to an oil massage in just her lingerie. Can Yumiko endure this ultimate sensual torment?