Riri is a pure, serious nurse with little interest in sex. She quietly tolerates patients touching her at work rather than risk disturbing the ward and affecting others’ care. One late night, however, a patient secretly molests her inside the hospital. Despite her indifference to sex, the forbidden touching unexpectedly arouses her. She begins wishing it would happen again and fantasizing about being made to feel even more. The secrecy intensifies every sensation, while the need to suppress her voice adds tense excitement. Before long, Riri has changed into a shamelessly eager nurse who waits every day for another clandestine groping session.