Vermeil in Gold

, usually just known as Vermeil in Gold, is a Japanese manga series written by Kōta Amana and illustrated by Yōko Umezu. It has been serialized in Square Enix's shōnen manga magazine Monthly Shōnen Gangan since August 2018, with its chapters collected into 6 tankōbon volumes as of June 2022. An anime television series adaptation by Staple Entertainment aired from July 5, 2022 to September 20, 2022 and ran for 12 episodes.

Plot
Alto, an aspiring magician, is about to repeat a grade when he accidentally summons the demon Vermeil, which was sealed in a book Alto found by chance. Not only does Vermeil hold an ancient power capable of bringing about the end of the world, she's also quite naughty! A traditional fantasy story about a struggling magician and his powerful familiar begins with their fateful meeting!