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

Betrayed by her betrothed and bullied by her family, a young noblewoman named Charlotte Evans flees her home and stumbles into the hands of Allen Crawford, a misanthropic wizard known as the Dark Lord who lives in a solitary mansion deep in the forest. When he hears the sad story of Charlotte's pitiful life, he discovers a new calling—giving her a crash course in all things naughty, from late-night feasts of cake and ramen to sleeping in till the afternoon, from dressing up in cute outfits to fun-filled days at the beach. Allen is determined to pamper Charlotte with every irresistible pleasure imaginable.

Super sadly this is the only one of its kind