Kaori is a high school girl who loves wetting herself. Every day, she goes to school wearing diapers, restraining her urge to urinate while enjoying masturbation as a habit. After school, she plays alone, indulging in this pleasure. One day, while stalking her crush and classmate Takashi, she gets caught and panics. The shock causes her to fart, defecate, and wet herself, making her even more aroused. That night, Kaori heads to Takashi's house, determined to defecate in front of his entrance. Her impulse is already uncontrollable—she can do nothing but revel in her excitement.