When Hinagiku Kayo, the Agent of Spring, is kidnapped, the essence of spring disappears, leaving the world trapped in a perpetual winter. Undeterred, her loyal protector, Sakura Himedaka, dedicates herself to finding Hinagiku over the years. Once Hinagiku mysteriously reappears, the two embark on a quest to bring back the vanished season, confront the history that separated them, and reclaim the warmth they are determined not to surrender again.
