Yuri, a short-haired high school girl who worries about the femininity she is expected to display, is tricked by her homeroom teacher, Tsubasa. One day, unable to hold her urge to pee, she wets herself spectacularly in front of Tsubasa, who is Tsubasa. Tsubasa, knowing her weakness, forces her tongue into the reluctant Yuri's mouth and overwhelms her with a French kiss, then takes her to her house and makes her squirt with cunnilingus and fingering. Yuri, who has awakened to her carnal desires, falls into Tsubasa's trap...