At a school that sorts students into classes based on their grades, a beloved figure named Renjou Kaoru reigns supreme as the prince. He's charming but introverted, and everyone adores him... except for Amakawa Yumi, a second-year pupil who's completely smitten with her classmate Kokonoe Yukito, a childhood pal of Kaoru's. However, Yumi is unaware that Kaoru is hiding a surprising secret behind his timid demeanor.