Growing up in a dull suburb, Sakuma's mundane existence brightens only through his friendship with Ushio, a popular and talented individual who seemingly possesses all that Sakuma lacks. Their bond weakens over time due to past trauma and Sakuma's feelings of inadequacy, leading to a distant relationship by high school. Alone and isolated, Sakuma discovers solace in Natsuki, a kind classmate with whom he shares a deep love for books. However, a surprising encounter with Ushio, wearing a schoolgirl's uniform and in tears, reshapes the dynamics of their past friendship.