This is a game concept set in a world where music is both cultural identity and a powerful force that can create or destroy. Nations are divided by genres like rap, jazz, EDM, rock, and K-pop and J-pop, keeping a fragile balance after a past disaster. In Tonic City, Melodians are trained to control music and emotion, each bonded with a sentient instrument. Some instruments resist and become the Unforged, who believe music should be free. The player chooses one of five Melodians, fights these outcasts, and begins to question what true harmony means.