On a long-distance bus on the way back from a festival, Meisa wakes up in the car to find herself molested by a man she doesn't know. She is so scared she can't even make a sound, but he makes her cum with his fingering. After she climaxes, he takes her to the toilet at a highway rest area and fucks her from behind. They return to the bus and he fucks her closely so no one notices. She becomes addicted to the pleasure she's never experienced before, and becomes his convenient sex friend...