When Yuna Lee's mother moves to Germany to pursue a music degree, she's left to stay with her father, a university professor, and her three older brothers, who are fiercely overprotective of her.

During her summer vacation, she visits her mother in Germany, where she falls off a cliff and is rescued by Rieno, an 18-year-old knight living in the land of Phantasma. Rieno makes a deal with Yuna that because he has saved her life, she must marry him and become his queen. Indebted to him for saving her life, Yuna is torn between her normal world back home and life as Phantasma's Queen.

The Queen's Knight is another manwha classic from the creator of the bestelling shoujo series, I.N.V.U..

Kim Kang Won

Kim Kang Won's I.N.V.U. ('Innocent' 'Nice' 'Vivid' 'Unique') is a romantic melodrama/dramedy about school, work, relationships, and family ... with a tiny bit of gender-switching thrown in for good measure!

Yuna Lee
Youngest child of the Lee family and the only girl. Main character, age 15. Currently in 8th grade. Has three older brothers who are protective of her. Her father is a professor at a university. Her mother is in Germany, pursuing her degree, which was on hold due to the arrival of children. Has a crush on her childhood friend, Kahyun Song, who happens to be her third brother's friend. Went to visit her mom in Germany, during summer vacation, and broke her leg.

Rieno
18 years old. A knight in the land of Phantasma. He rescued Yuna after she fell off a cliff in Germany. He promises to save Yuna's life, if she promises to become his queen and follow him.

Jin Lee
Eldest child of the Lee family and Yuna's eldest brother. Currently in his second year of college, majoring in computer science. Known for being responsible.

Hyun Lee
Second child of the Lee family and Yuna's brother number 2. He is a senior in high school, and known for being a flirt and for being self absorbed. Currently working part-time jobs to buy a movie camera.

Beum Lee
Third child of the Lee family, and Yuna's brother number 3. 16 years old. He is at the top of his class, in both academics and sports. Vehemently dissuades every guy who shows the slightest interest in Yuna. Loves animals; in fact, in Yuna's opinion, he is more caring and loving to animals than to people.

Kahyun Song
Yuna's childhood friend and also friends with Beum. 16 years old. A piano prodigy. Yuna's mom used to give him lessons when he was young. His hands were severely damaged in a car crash and he has been on leave from school for a year. It is said that he will never be able to play piano like he used to. His father is the local doctor and owns the hospital. Seems to care for Yuna.