The amazingness of this song... is... just.... T.T I love Core Pride
I am not the person who sings this, I am just a big fan of his. here is his channel you should check him out :3
Soundtracks composed by Hiroyuki Sawano for Anime and Japanese Drama. Vocals by Mika Kobayashi, mpi and CASG (Caramel Apple Sound Gadget).
All credit goes to the creators of the soundtracks, I am just a distributor.