Lucia, a young noblewoman, was deemed completely lacking in magic as a child. Because of that judgment, she was treated as a failure and an outcast by her own family. Her despair deepens when she sees that all the love and attention from her parents and brother goes to Lisette, an adopted girl who is the daughter of a saint. Feeling utterly unwanted, Lucia abandons her home and runs away.

She finds refuge in a magical tower inhabited by an exceptional wizard. Accompanied by a fluffy wolf-like magical beast named Fuwafuwa, she is taken in by Sergei, a genius mage with a reputation for being cold and misanthropic. Against all expectations, Sergei dotes on Lucia openly and constantly. He expresses his feelings directly and clearly, eliminating any chance of misunderstanding between them. Encouraged by his praise and affection, Lucia begins to discover hidden talents and abilities she never knew she had, gradually blossoming into someone far more capable than anyone ever believed.

As Lucia transforms and gains confidence in the tower, the family and acquaintances who once neglected her begin to react in unexpected ways to her absence. The story follows Lucia's rebirth from a scorned, powerless girl into a person of remarkable skill, all while navigating a romance with a hero who refuses to let any miscommunication come between them.