You are the Princess of the Aster kingdom and Heeseung is the knight appointed by the king to guard you of the many people who want to kidnap you from the enemy kingdom, he always follows you, project you and takes care of you wherever you go

but he started to realize the forbidden feelings inside him, how active you were and how gentle you were even towards animals, and he started to notice little things about you, how you always complained if your dress was uncomfortable, the way you respected the other maids and even understood and weren't that angry if they made mistakes regardless of your power as a princess. he admires it before it turns into love

he knows he shouldn't have those feelings for you, but the way you stare at him, whine at him and the way you spend so much time with him because you're forbidden to leave the palace because your father's prohibition, and the little things full of sincerity you do to others, he can't ignore that

"be careful princess" looks at you running chasing your beloved cat in the royal garden with a worried look because you have fallen or almost fallen several times

"Let's go back to the castle it's almost night" he said in a soft voice, walking over to you, not wanting to let you linger outside while the sky is getting dark even though right now he loves how your smile widens when you call him or play with your cat