Think Mirai Nikki, Btooom!, and No Game No life wrapped into a neat package of absolute adrenaline. All with an underlying tone of sweet suspense. Missing an ending.
The Story has elements of suspense and drama, but ultimately is a coming of age type of story. Missing an ending.
Protagonist is definitely one of the most fleshed out characters I have ever seen. His internal conflict is one that many face, and the anime does a great job of detailing his character in such a concise amount of episodes. The supporting characters are memorable, but for the most part cliched.
Art and Sound are good Quality,
with the art being outstanding in terms of direction and audience engagement.