*Jolt!!* (Wait… something just touched my bottom… The train is crowded, so it must have just been an accidental bump, right…?) A sudden, abnormal event shatters the peace of her daily life. A beautiful, impressionable student finds herself a constant target for groping. *Jolt!!* (Could it be… that I’m actually a pervert…?) She struggles desperately to keep from crying out as she experiences sensations of pleasure she’s never known before. Highly sensitive and unable to voice her feelings, she becomes an easy target. *Trickle, trickle, trickle…* (Oh no, I’m wetting myself… how embarrassing… please, don’t look…!) A beautiful girl—who seems not to even know the word "groper"—finds herself becoming completely, innocently absorbed in the illicit pleasure taking place on the train.