Twenty minutes of my life I won't get back.
I'll give this anime credit where it deserves it. The initial story concept is decent. Also the art, and voice acting were alright. Besides that it was terrible. The characters are boring. The most fleshed out characters only defined personality trait is that he wants to sleep with his sister. The stories premise raises way to many questions for a one episode release, and answers none of them. Even if this were a complete series I would have dropped it here because the characters didn't hold my interest, and the plot was a complete mystery.