English title : BR Method
Producer : LIQ
Vocaloid : 初音ミク (Hatsune Miku)

LIQ wrote this song for a Project Sekai contest. The contest is still going and producers can still submit songs so we don't know yet who will win (I hope it's LIQ). The winner will see their song added to the game.
Edit : the contest is over, the winner is not LIQ, but irucaice with the song Brand New Day.

Normal ☆6
Hard ☆7
Extreme ☆9