Shidoukan Day After The Animation is a hentai based off a hentai manga with the same title(minus the animation part obliviously) made by Bang-You. It doesn't contain all of the chapters just a selection of them and not in any particular order. A quick summary of what they did animate can mostly be broken down to a female athlete wants to get better and she does so by getting raped by her coach. So not the most compelling story but at least it has a story that is easily followed which is more than some other hentai can say.
However, there is a clear decline in quality when you compare it to the source material. The story is a little more developed and feels less rushed through than what the animation accomplished, and the art is clearly a step or two below the manga. Which is unfortunate since Bang-You does an excellent job drawing athletic women with a charming tomboyish style. To add on top of this the animation is fairly bad as a few scenes are clearly two images just sliding back and forth or just a scene on loop with a panning camera.
Overall, if you're into coaches raping their students and can overlook sub-par art and animation you would probably enjoy this one a bit. If the art and animation are a bigger deal or you just want a better product, just read the source material instead.