Riri is a pure and earnest nurse. While patients sometimes touch her body while she's at work, she has little interest in sexual matters and has lived a quiet life, refraining from doing so because it would have a negative impact on the health of other patients. But one night, she is molested by a patient in the hospital. Despite her sexual indifference, she is suddenly turned on by the molestation. She wants to be molested again, to be made to feel even more, and her desire grows...