At a clinic run by Dr. Makimoto, a homosexual physician, and Nurse Matsushita, they specialize in unconventional sexual therapy rather than standard medical treatment. A new patient arrives with a physical disability in her lower body—Haruki, a mature futanari woman suffering from a mysterious condition: she can ejaculate endlessly yet never achieves an erection. Having long struggled with her intersex condition, Haruki now desperately wishes to become a woman and requests penile amputation. Thus begins her inpatient treatment under the care of the three medical staff members.