The Masquerade Ball Chorus Battle (MBCB) was hosted on December 13, 2012.
The participants' identity had to be hidden behind a secret alias, including singers, mixers, animators, artists and judges.
Each group had to create a story based around the given theme for each round. The story was to be presented in the song, the video, written separately or any other way.
Progression of rounds were decided by 80% judge decision and 20%
audience vote. The judges were revealed to be Cherri, Nipah, Tohru and AmaitoFuu.
The winner for the first place got a visual novel featuring their group's story, with their own character art.
Additionally, the first as well as the second place got the visual novel two weeks before the public release, as well as a guide.
Additionally, at the end of round two, those who didn't pass could participate in a side competition, where solely the audience determines who the winner will be. The reason was to give the groups a chance to complete their stories.