Set in the pediatric ward of a university hospital in a certain country, this is a rebellious comedy. The ward is home to various children, and among them, Jisulfiram—nicknamed "Jisufi"—is known as a high-risk troublemaker, ranked Danger Level A, constantly causing headaches for the adults. One day, however, things take a turn when a new patient arrives: Cutie Pie, who is classified as Danger Level A+. With their arrival, the story begins to unfold!