A beautiful, young elven duke is being urged by the crown prince to get married. But because of his beauty, he had been having troubles with women since his debut and ended up having a huge dislike for them. Then, he remembers a promise a mage made with him 10 years ago: “In exchange for my daughter’s hand, I want you to let me read the books in the forbidden archive.” He found it troublesome to find a suitable marriage partner at that time, so he readily agreed to the exchange. Having remembered this, he heads to the mage’s estate to take that same daughter as his wife, only to discover a terrible truth: when touched by the opposite s*x, the lady turns into a cat! Although he is not pleased with his cheeky and strong-willed bride, he is actually a huge cat lover. The Duke’s troubled days begin.