Chimera is one of those hentai that are a little tougher to rate than others due to it delivering pretty well on the story and creating a world but failing pretty bad on delivering decent sex scenes. The story is basically broken up into two stories, the first being a revenge/origin story for Rei, the main character, and the second following an encounter with the victims family after Rei kills their father. Bothare pretty interesting and solid stories and would probably work as a decent action anime.

The art is good for the time it was made and the animation is also well done. There is very little to nit pick it for unless its style isn't in your taste.

The only really big flaw is it fails as a hentai. There are only a couple of sex scenes that are very brief and show relatively nothing outside of implied shots and silhouettes majority of the time. These are really huge drawbacks if your looking for something for fap material.

Overall, if you like action, futanari/hermaphordite, and a solid story then you might enjoy Chimera a bit. If you're looking for a good hentai you probably should look elsewhere as this won't deliver enough quality scenes for that.