"Detroit Metal City" is a 12-episode anime series based on the manga by Kiminori Wakasugi. The story centers on Soichi Negishi, a mild-mannered young man with a passion for soft pop music, who moves to Tokyo to pursue his dream of becoming a musician. However, his aspirations take an unexpected turn when he is recruited as the lead vocalist and guitarist for Detroit Metal City (DMC), a death metal band known for its outrageous, violent, and sexually explicit performances. Despite his distaste for the genre, Negishi adopts the stage name Johannes Krauser II and becomes the face of the band, hiding his true identity from friends and family.

Negishi struggles to reconcile his gentle personality with the over-the-top, aggressive persona he must embody on stage. His dual life creates constant tension, as he fears being exposed and judged by those around him, particularly Aikawa, a college classmate he admires. Aikawa, who despises DMC and its vulgarity, remains unaware of Negishi's involvement with the band, further complicating his attempts to win her affection. Meanwhile, DMC's popularity grows, fueled by their shocking performances and Krauser II's enigmatic image, which contrasts sharply with Negishi's real-life demeanor.

The series explores the absurdity of Negishi's situation through a mix of comedy and satire, highlighting the clash between his personal values and the demands of his career. Supporting characters, such as DMC's manager, Terumichi Nishida, and the band's devoted fans, add to the chaotic and often surreal atmosphere. Nishida frequently pushes Negishi to embrace his Krauser II persona, while the fans idolize the band's extreme antics, creating a cycle of escalating absurdity.

Throughout the series, Negishi faces numerous challenges, including rivalries with other bands, public scandals, and his own internal conflict. Despite his efforts to leave DMC and pursue his pop music dreams, circumstances repeatedly force him back into the role of Krauser II. The narrative balances humor with moments of introspection, as Negishi grapples with questions of identity, artistic integrity, and societal expectations. The series concludes without a definitive resolution, leaving Negishi's future open-ended but emphasizing the ongoing tension between his two lives.