The mainstream popularity of Anime as viable adult erotica has waned a bit over the years. Thanks to over-saturation and the distinctly fetishistic tendency towards rape and inter-specie (usually monster) sex, it is a marginalized sub-genre. Still, the selling point of this material is simple: Cartoon characters are infinitely more sexually dynamic than a human being.
Yumi is a naïve nursing student with all sorts of repressed sexual desires. Her internship results in the awakening of these desires. It's a familiar set-up in an episodic format, but the devout will savor the graphic enema, bondage and gangbangs. And unlike many live-action features, the sex here is always plot-driven, which is consistently outrageous. Lively dubbing aid in the comedic elements.