The episode summed up the travels and the willingness of Yuu to get rid of all the powers encompassed around the world. It was quite a jump from school settings to the whole world travel but in any case since its a 12 episode anime it encompasses it in a nice way and the ending had the feels due to the fact that it was a confession of love from the protagonist and the heroine which was built up from the start of the series. All in all, the anime is fun to watch if you like 12 episode animes and I would highly recommend it.