Chihaya Ayase, a spirited and tomboyish adolescent, lacks a clear-cut purpose in life. During her schooling years, she chances upon Arata Wataya, a recluse who is shunned by others. Despite disapproving social norms, Chihaya develops compassion for Arata and forms a close bond with him. Arata consequently introduces her to his outstanding karuta skill, kindling in Chihaya an aspiration to become the ultimate ruler of the game.