User blog comment:KodachiZero/Hatsune Miku Collaboration (Translated)/@comment-24.104.194.153-20141009095855/@comment-24.44.23.142-20141010004346

I fount it. Just type in 'brave frontier hatsune miku bgm' then look for the website 'bravefrontierpros.tumblr.com/' hope I helped :)