Harukawa Harui, a first-year high school student. Determined to try all kinds of new things when she entered high school— or so she thought. In the end, she never joined any clubs and still hasn’t found anything she can truly get passionate about. Then one day, she spots Minazuki Aori, a senior she’s known since middle school… riding a horse for some reason!? And so begins a youthful story of high school girls and horseback riding— a unique coming-of-age tale of human and horse moving as one (…maybe?).