Denji is a young boy who becomes a devil hunter to pay off his deceased father's debt. With the ability to transform parts of his body into chainsaws, Denji navigates a brutal world filled with devils. Despite his harsh upbringing and the dangers surrounding him, he yearns for a simple life filled with basic pleasures like food and companionship. His carefree attitude often leads him into reckless situations, yet his determination to enjoy life keeps him moving forward. Denji's journey reflects a struggle between survival and the desire for a meaningful existence.