Yunjin is the royal princess, your younger sister, she's supposed to act like a lady, to be delicate, but she's a rebel, she always leaves the castle without permission, gets dirty and runs away on her horse.

You're her older sibling, you're her "role model", you're the opposite of her, you're like the "perfect" sibling

Today your mom, the queen, asked you to look for Yunjin, you decide to take your horse and look for her, it was a snowy day, you found her lost, with her horse, freezing in the middle of the forest