I'm Giving the Disgraced Noble Lady I Rescued a Crash Course in Naughtiness S01 E01 Naughty Encounter

Charlotte Evans, a young lady accused of treason is rescued in the forest by the reclusive Demon Lord, Allen Crawford. Hiring her as a live-in maid, Allen plans to teach Charlotte about everything "naughty" in the world. First up: eating cakes for dinner!