As a completely amateur, Rin encounters sudden guerrilla downpours every time she goes out. Today, she boards the train completely soaked, and her nipples peek through her wet bra, catching the eye of a male passenger. He starts rubbing her ass at the train doors, and with nowhere to escape, Rin gets her clitoris stimulated by fingers, causing her to squirt profusely onto the floor. Later, at the next station, the two head to a public restroom stall and start furiously thrusting in doggy style. The sound of their wet sex echoes through the stall, unable to be contained…