The third installment in the series arrives! In this train setting, well-behaved girls in neat blazers or pure-looking sailor uniforms become targets. Naive girls in tight pants and mini skirts also appear. On crowded trains, their nipples are forcibly exposed, leaving them frozen in fear and embarrassment. Unable to cry out, they are relentlessly molested against their will. Sensitive nipples are carefully groped and kneaded, provoking increasingly intense reactions in vivid detail. The more they are tormented, the more aroused they become—drooling, overwhelmed by escalating pleasure. Soon, penetration follows with fierce thrusting. Finally, sperm is violently shot onto their hypersensitive nipples, capturing the ultimate moment of ecstasy.