A J-pop style schoolgirl who commutes by train every day. Her large breasts, visible even through her uniform, and her sexy lips are irresistible. Unable to control her own libido, she finds herself acting on impulse, surprising even herself. First, she molests someone on the crowded train. She places her hand on a soft, pleasant ass, then slips it inside the panties from above. Each time she touches the slightly wet schoolgirl pussy, her excitement grows. Later, watching the footage again, she notices clear signs of arousal—her own juices dripping. She's actually turned on. Realizing how aroused she is, she drags the girl into a public restroom and starts deepthroating her, pistoning hard into her throat. The girl drools uncontrollably, her face twisted in anguish, yet she takes it all—pushing Eru over the edge. She cums directly onto the girl's tonsils, but it's not enough. She knocks her out and does whatever she wants. The intense stimulation is too much for the girl's inexperienced pussy, yet gradually, she begins to awaken. Eru focuses on deep vaginal thrusts, creampie after creampie. By the end, she's already thinking about doing this again with another girl.