Chiyo Mihama, a young prodigy, accelerates to high school and encounters a colorful cast of classmates. From the towering and enigmatic Sakaki to the boisterous Tomo, the absentminded yet clever Osaka, the diet-obsessed Yomi, and the competitive Kagura, each with their unique quirks. As their bond deepens, they navigate the ordinary routines of school life, from studies to summer escapades, filled with mischievous antics and shared moments.