Zenitsu is late for class, and the only thing between him and Giyu's bamboo sword is one good excuse. Next, when Inosuke, Murata, and Zenitsu fail sword is one good excuse. Next, when Inosuke, Murata, and Zenitsu fail their midterm, they must endure the harshest math lesson of their lives. their midterm, they must endure the harshest math lesson of their lives. Then there's Uzui's explosive art class, Nezuko's first cavity, and Rengoku's forbidden pizza!