Denji never knew a normal childhood, burdened by the crushing debts left by his father. His sole companion was Pochita, a chainsaw devil, and together they hunted other devils for money that was immediately seized by the yakuza. All Denji desired were simple things: good food and a kind girlfriend. However, when the yakuza betrayed him, Denji met a violent end, shattering those dreams. Yet, fulfilling an old pact, Pochita merged with Denji's body, granting him devil powers and transforming him into a chainsaw-wielding hybrid. Makima, a top devil hunter from the Public Safety Bureau, recognized the danger Denji now posed and took him in under close supervision. Driven by the promise of a stable life and a beautiful companion, Denji threw himself into Makima's mission, fighting relentlessly to make his once-innocent dreams a reality.