Chijoku Kankin: Ochita Tenshi-tachi

In an old hentai that only lasts for one episode, there is no main plot. The story takes place in a rural hospital, which looks normal during the day, but after work becomes a place of debauchery under the direction of the chief doctor. He turns a new nurse into his sex slave, aided by loyal helpers already enslaved by him. Will the girl be able to resist the doctor's dictates?