A severely perverted proctologist who became a doctor to satisfy his sexual fetish. His female nurse assistant, 'rei,' is also a die-hard anal enthusiast, dedicating both her heart and anus to the doctor. Today's patient is 'kotomi,' who has been feeling discomfort in her anus since her boyfriend suddenly had anal sex with her. Changes occur to kotomi as she undergoes relentless anal examinations by the perverted doctor and nurse.
