In this late night movie at the cinema, a sleepy OL (Office Lady) is tied up while she sleeps by someone who sneaks under her seat. Unable to make any noise due to being gagged, she experiences silent orgasms during forced ejaculation. Despite trying to suppress her voice, sounds of touching herself, urinating, and moans are still audible. Her fingers tremble slightly but they move naughtily, attacking their prey without making much sound. Even though there aren't many obvious gasps or groans, the rhythmic slapping sounds can be heard clearly.