| Saturn, Anno 801. || Music is banned for 141 years now. | B0B0 is one of the Doppelgangers, twins born as perfect human beings fit to obey the purpose of the caste they were assigned to. Her purpose is to serve in the lowest caste for the prosperity of Saturn, but B0B0 doesn't quite agree to that. Amidst a revolution against the Saturnian Satellites, the ultimate form of law, B0B0 hears news of a newfound music robot that'll fit right in her illegal band as a drummer. Rebelling against the corrupt system using music is the only thing she knows how to do well and she only needed a drummer to join her pack of misfits. With every piece in place, she's out to break some laws, and discover the truth behind the essence of music, the Keylocker.