Mia, the daughter of a viscount, spends her days swamped with work from the Adventurers’ Guild and helping out in the alchemy workshop of her fiancé, Ziel, the son of an earl. With their wedding plans already arranged and her resignation approaching, Mia happens to witness Ziel cheating on her. She decides to break off the engagement. As Mia falls into despair after having all her efforts disregarded, the royal court alchemist, Crane, suddenly invites her to become his assistant!?