In the bustling city of Kouchi, high schooler Taku Morisaki receives a urgent call from his friend Yutaka Matsuno to rush to their school. Upon arrival, Taku meets Rikako Muto, a stunning newcomer from Tokyo known for her academic and athletic prowess but marred by a prickly demeanor that isolates her socially. An unexpected twist during a school trip draws Taku deeper into Rikako's world, straining his friendship with Matsuno. Caught between loyalty to his friend and newfound feelings for Rikako, Taku grapples with the impact of a girl with a troubled past on his own life.