Ryeoun's characters Hong Siwoo and Ha Eungyeol have so much similarities
1. Both characters are 18 years old
2. Both characters meet their 18 years old fathers and befriends them
3. Before the meeting their 18 years old, both characters are loners in their school
4. Both characters were bullied in school
5. Both characters and their fathers are sharing similar talents and interests

Both dramas tackles issue about yeolnyeo/virtuous lady during joseon era. Both female leads lost their husbands at their marriage day and expectation of both ladies to be loyal to their deceased husband

Both dramas have strong and tomboyish female main characters who lived under strong confucianism tradition that limits their freedom. Both of their characters are very ahead of their time. The difference is that the FL in Mr. Queen is actually a modern male soul trapped in FL's body