Am I the only one who feel that the sound is too bright to be in the story created by Urobuchi O___o? It’s even brighter than SAO’s. Remind me of some cheerful Kalafina’s song like Symphonia or Mirai…. Hmm the latter is from PMMM though…lol.
Probably, Urobuchi may offer a light-hearted fantasy story once in a while…? (Or they just showed only the optimistic side in this trailer?) I found some manga translation in Google, but I don’t want to spoil myself that much by reading the whole thing just to know if there are any dark sides behind the scene…lol.