Thrust into a realm of swords and sorcery by the blue demon king, Shinichi Toyama finds himself in an unexpected role as a reluctant hero. Despite the demon king's gentle intentions and his affectionate food-loving daughter, Shinichi faces a constant threat from resurrected heroes bent on his demise. Determined to protect his newfound world, Shinichi sets out to thwart the relentless heroes and transform into a formidable devil.