Silently Promising to Fly Together

He is a nobleman of an enemy country. In order to save his father who was defeated and captured in the war, he traveled thousands of miles and sneaked into the palace. He changed his appearance and assumed the identity of a eunuch to wait for the opportunity. The first time he saw her was in the cold palace. He was assigned to send gifts to each palace. When he passed by the cold palace, he was captured by her proud and upright back in the cold palace when he first saw her.