Kimajime Reijou desu ga, Ojou-sama (Kari) ni Narimashite!? Wake Ari Hanayome no Yuuutsu na Sainan

Julia, a member of the Kingsguard, falls off a cliff with Princess Laura. When she wakes up, she finds that her body has been switched with Laura's! She is now married to King Leon, the princess's husband, but he is not only a bully but also has a keen sense of intuition, and they are in big trouble!