When a naive rural boy, Kouta Oyamada, moves to a bustling city high school, he is approached by the most beautiful girl in school for a secretive rendezvous. Meeting in the music room, he is captivated by her luminous hair, imploring eyes, and blushing cheeks. But as he notices a fox tail, Kouta is left bewildered by this enchanting yet enigmatic girl and her hidden intentions.