One of the best specials i've seen (i didn't see much, though). The other one would be Steins;Gate one. It is "kinda prequel, kinda not" It's interesting, it's fun, it's compact. It also has good music, like an original show. Yes, it doesn't add much to the series, but then, how many specials do? It's actually not that bad to watch on its own, without series, because of how story is served I absolutely recommend this concentrated fun package. It won't take a lot of your time anyway. Also, you can use it as the show ad to agitate friends! If that is even possible ...I don't know whatelse to type without spoilers about non-serious 10-minute show, but this site forces me to write a longer review, so be it, i am making it longer, just to make system happy and everyone reading this too, so long, just wow...