Ero Semi follows a teacher that is visiting a summer cram camp to prepare students to pass exams to get into the schools they want. Of course the best way to teach all these girl students is through sex and falling in love. The story is a fun one but not to original, however the biggest problem is the pacing of the episode. Majority of the girls development, sex scenes, and flow from one scene to the next is just way to rushed and at times hard to follow. This one really needed to be broken up into multiple episodes at least 2 if not3 or more.

The art is fantastic though, all the girls look great and very appealing. The animation for the most part is pretty smooth and looks nice for a hentai with only exception happening in the sex scenes occasionally, were the sex animation flow is a little off.

For a vanilla harem hentai, this is one of the better ones and one I'd recommend to anyone that enjoys harem hentai.