The cursed existence of Pandora's Box resulted in the unleashing of evil through a woman's curiosity, which nearly engulfed the world in darkness. Although humanity managed to seal Maou Kestra back, it came with immense sacrifices. Despite their lord being locked away in the deserted capital of the North, Hameln, the demons remained a formidable force that grew stronger with time. After fifteen years since the fateful battle, the story introduces Hamel, a self-centered travelling minstrel, who is willing to cook his guardian crow, Oboe, to avoid hunger. The Violinist of Hameln's world revolves around music and absurd chaos. Hamel shoots down his rivals and turns pigeons into dinner with his enormous violin. With such a hero, the question remains on how the world will be saved from Maou Kestra's wrath?