The female student, Rin, encounters sudden heavy rain every time she goes out. Today, she boards the train completely soaked, but her see-through bra is stared at by a male passenger, and then her ass is groped by the door. With nowhere to escape, Rin has a finger inserted into her panties and her clit stimulated, causing her to spray large amounts of fluid onto the floor. Afterwards, the two get off at the next station and start vigorous piston riding in a stall of the public restroom, but the sound of splashing fluids cannot be silenced…
