Airi Mizuhara is a girl who saved a cat in exchange for her life. When she opened her eyes, she is now a part of one big family. The youngest daughter of a farmer and a sewer. Hated by her siblings and is called a freak because of the way she thinks. But her family didn't know that she wields Magic in her body which is very rare for a commoner to have or to even exist. She was sold and went to the capital to learn to wield magic by having a sponsor.

But little did she know that the sponsor is... The Duke of Bluefort. The famous Magician of the Magician Tower.