I DO NOT OWN THE SONG OR THE MUSIC, THIS IS PURELY FAN-MADE!!!
So I tried to search some songs that would fit the different characters from the anime, and this is what it became. I don't have everyone yet, including some main characters, but I'll probably make those sometime in the future.
yuuji: this is the end - the doors
mizuki: banana song - yuna from kage kara mamoru (if you don't get this one, watch kage kara mamoru and you'll see the resemblence)