In my review about this anime I said that It wasn't a masterpiece however there were a lot of elements do a second season that can become a master piece and this OWA is a clear demonstration of that. I really enjoyed the OWA giving me a better connection with the protagonist and also it clarified many questions if the whole anime. In general the great problem with this anime is that the creators had overload this anime and there are many things with no conclusion. I thing this OWA comes to help to mitigate that overload and really I hope a second season.