A perverted chikan (peeping tom) with a fetish for golden showers lures innocent girls onto crowded trains by slipping them diuretic candies. As time passes and their bladders fill up, they become increasingly desperate to find a bathroom. He teases them relentlessly until they can't hold it anymore, forcing them to wet themselves right there on the train! Overwhelmed with shame yet unable to stop cumming, these poor girls experience one climax after another while losing control of their bodies and minds!