It's an absolutely ridiculous story. I was interested in it because of the title. World's End is a place in Murakami's postmodern psychological thriller novels. And harem automatically boosts a series to be worth checking out in my book. Like other reviewers said, it's a mix of H and traditional anime because the scenes are not explicit and not a main focus. I'm surprised there is decent plot depth, such that I want to watch more to know the conclusion. Overall, I give this a 6.5. It could be a 7 but some of the art looks like it was done by an amateur studio in SAIwith no post-processing. Excessively large and unshapely breasts are also not great signs of taste and artwork.