That Time I Bought a Great Wizard in Hopes of Becoming a Runaway

Giselle, after finding out that she's to be married off to a perverted Duke in place of her younger sister, devises a plan to run away from home. However, in her visit to the slave market to find a male helper, she unwittingly ends up buying the beautiful-yet-arrogant Elvis! Elvis asks for Giselle's cooperation in lifting his curse, slowly bringing curious changes to his body and mind.