The protagonist, "Balloon Man," accidentally discovers he possesses a supernatural ability: whenever he touches the skin of any living being, he can issue a command causing the target to, within a specified time, inflate, expand, and contort like a balloon, ultimately dying in an "accident." From then on, "Balloon Man" became a professional hitman, offering high-priced assassination services to clients with a wide range of requests. Among these clients were those seeking to secure an inheritance, those wanting to kill the daughter of their husband's first wife, those aiming to strike against rival companies, and those seeking to ensure victory in an election...