Aren't most anime contrived as hell? There's always the innately powerful bad ass in shounen/action shows, dramas have their own contrivances. I just accept the simple absurdities because if I can't do that I can't really enjoy anime. Honestly, it isn't until much later in the manga where it kind of starts to feel more normal and a bit less contrived. Although that's because so much had been setup earlier hah. I enjoy the music aspect of "music anime", which is why I tend to like them I think. It's rare for an anime to go against expectations, Ga-Rei Zero was one of those, even though it was a manga promo. Chihayafuru is a little unconventional too, as was that one tennis show, Baby Steps (asides from the one special ability the protagonist had).
I laughed at the "twist". I was like...are you serious? lol.....I stopped at 90, didn't read it. It didn't seem like anything impressive and I felt like it was a good stopping off point.