A new law legalizing "flesh toilets" has finally passed as a measure to combat declining birth rates and stimulate youth sexuality. As a result, women who receive the red notice are forcibly turned into flesh toilet slaves. Yuri, a beautiful big-breasted schoolgirl, and her childhood friend Takeshi have always been close, often eating together at home and chatting casually on their way to school. Takeshi secretly harbored feelings for Yuri, cherishing their everyday routine—until that ordinary life came to an abrupt end.