In prison life, basic activities such as eating, bathing, and excretion are strictly controlled, and masturbation is completely prohibited. In this harsh environment, Honjo, a senior sexual treatment officer, is responsible for the mental and physical care of inmates. She plays a crucial role in treating severely distressed prisoners whom regular guards cannot handle. Remaining calm even when penetrated, she meticulously performs vaginal treatments. Dedicated to the rehabilitation of prisoners, she carries out her duties every day.