Horny couple M-kun and Ayumi, both in their late teens, can't resist each other's magnetic pull on a near-empty train ride home. The risk of being caught in the act by fellow passengers only intensifies their arousal. Ayumi's big, perky tits bounce as M-kun pounds her from behind, her tight pussy gripping his cock as he thrusts in and out. Their moans are barely muffled, adding to the thrill of their risky tryst.