In the near future, a national program has been introduced to address the severe issue of declining birth rates by collecting young men's sperm. At one particular school, male students are required to provide sperm samples to female students, with their academic performance directly tied to the amount collected—an abnormal system enforced strictly. The girls, exploiting the supposed sperm-boosting components found in female urine, force the boys to repeatedly drink their urine in grueling sessions. With sperm collection mandated and directly linked to grades, the female students push the males into continuous urophagia to maximize output. This system amplifies psychological and physical stress on the boys, escalating to the point where violence and coercion are tolerated. The urine-drinking acts are monitored through specialized devices around the clock, placing the male students under constant surveillance and control. Within this twisted social structure, the girls tie their self-worth to sperm yields, while the boys endure relentless compulsion and abuse.