After giving in to a dare by her classmates, Riley's desire to fit in lands her within a dangerous fantasy world where shadow-like creatures could attack at any moment. After being found by a teenage boy -who has fox ears and a tail- she finds herself within the care of a guild that specializes in hunting down these shadow beings. With the aid of the guild, will Riley find a way back home, or will she learn something about herself even she didn't know within this fantasy world?