Pretty good special. Although it was released after the BtW anime, in terms of the manga this actually came first as a one shot. We get to see how Balgo gets involved in the world of Reverse London. That makes this a good entry point into the series, even if you haven't seen the first anime. If you have seen the first anime, I would highly recommend watching this special too. There's not much to say other than that as the original chapter was more of an introduction to the world of BtW, and this special just adapts that. Characters are fun and quirky, theart and animation are gorgeous and the soundtrack is pretty good. Reminds me of those old OVA's from the 80's and 90's. I suppose if there was one thing I didn't like, it's that the tone stayed a little too light hearted during the climax. I feel like a tone-shift would have been good there.