Mizuki Yamada always believed she was an ordinary girl, until a mysterious letter arrives, inviting her to Arashi Academy, a legendary school for magic hidden in the mountains of Japan. Thrust into a world of elemental magic, powerful spirits, and ancient clans, Mizuki quickly discovers that she doesn't fit into any of the school's categories of fire, water, wind, or earth magic. She possesses a rare and uncontrollable power tied to the moon, a power that both excites and terrifies her classmates.