Souichi Negishi, a shy musician with dreams of pop stardom, finds himself entangled in a contradictory double life. By day, he pursues his passion for catchy melodies, but by night, he transforms into Johannes Krauser II, the fearsome frontman of the death metal band Detroit Metal City. Juggling his dual identities, Souichi grapples with the tension between his true self and the demonic persona he embodies on stage. Alongside his bandmates, each harboring their own secrets and desires, Souichi navigates a turbulent path where loyalty, ambition, and identity collide. As he wrestles with the conflicting forces pulling him in different directions, Souichi must ultimately confront the question of his fundamental essence—will he embrace the darkness of his alter ego or strive to realize his musical aspirations in the light?