Inyeon

When he was young, he followed his father to the palace, but happened to meet Crown Prince Gi-Ryeon. Sin-Yeon falls in love at first sight when he sees a manly and beautiful prince, and Gi-Ryeon also likes Sin-Yeon's innocent and pretty appearance. As time goes by Sin-Yeon realizes what he feels like every time he meets Gi-Ryeon, he eventually leaves for a dangerous outskirts to control his growing heart.

(Source: Lezhin, translated)