On her way home from ballet class, Saki gets caught up in an unexpected incident on the train. A molester uses his hands to toy with her surprisingly soft body in flexible poses, groping her crotch repeatedly. Saki feels her own masochistic nature through the first-time shame and immoral pleasure. She gets wet from the molester's finger technique and climaxes many times.
At night, the memory resurfaces, and she begins to masturbate while recalling it. But is this reality or delusion? Surrounded by a group of molesters, her crotch is spread open 180 degrees and she is violently fingered. Taking advantage of her serious and docile personality, she is violated in public places while still wearing her uniform and leotard. Saki's figure, falling into forced orgasms on the train and in the library, captivates even the onlookers.