Based on a game by Mink's M no Violet division.
As for the preceding OVAs from Night Shift Nurses, the plot of
this one centers around Yagami Yuu who likes being a responsible
nurse at a hospital, she tooks her work in first place, giving
pleasure to the hopeless patients in a descending spiral in a
non-stop way, each time more perverted and dirty, reaching the
downs of sexual behavior.