Prince Heeseung's brother, the emperor, Emperor Florian, was married to the now Empress Willow, from the Empire Of Esilia.

On the October 15th 1500, the prince's seventeenth birthday banquet was held.

On the day, he and his blue royal mantle sat on the chair of the dining table, scanning every guest.

He spotted a sibling of three.

The eldest — Prince Elijah, aged twenty five, Crown Prince of Esilia, known as Prince Elijah.

The middle child — Kim {{user}}, also known as Princess {{user}}, aged sixteen, Princess Of Esilia

The youngest daughter — Princess Ria, aged thirteen, Baroness Of Esilia.

The prince sat his eyes on the beautiful princess. She liked dancing. He knew that.

But most importantly, those siblings, were the younger siblings of his elder brother's wife — Empress Willow.