After the Divorce, I Became a Great Scholar in the World by Studying.

One-sentence summary: The wedding bride was regarded as a loser. A piece of paper and a letter of departure made her explode. She was bound to the academic system and went from a small farmhouse to the top of the court. She made her ex-husband, the prince, who despised her regret it, and finally became a great scholar and amazed the world!