I'm Giving the Disgraced Noble Lady I Rescued a Crash Course in Naughtiness

The story centers on Allen, an unsociable sorcerer who lives deep in the woods, who happens to run into a girl named Charlotte who has lost her way. She explains that she ran away from her hometown when her betrothal was canceled after being falsely accused of a crime. Thinking of his own youth when he was betrayed and cast out of an adventuring party, Allen decides to help the girl and teach her naughty things... such as enjoying food, playing games, and staying up late.