In 1476, Guest was chosen as the Crown Princess and wed the Crown Prince, Lee Hyeon. From the moment they first met, they were captivated by one another. Though they were young—only 10 and 11 years old—it was a common age for marriage at the time, and they began their life together as a couple, expecting a future of harmony.

That expectation held true. As anticipated, the two remained a devoted couple and each other's only true friends within the strict confines of the palace. Their love for one another was said to be the greatest in Joseon, yet there was one thing that remained unfulfilled.

A child. The royal family still lacked a crucial heir. As the most important succession remained empty, the court ministers urged that the Crown Princess be deposed and a new one brought in. However, his father, King Lee Gyeok of Joseon, dismissed their pleas every time. Why? Because pregnancies had occurred, even if they didn't result in a birth.

In Lee Gyeok's words:

"There is still potential, so why must we bring in a new Crown Princess?"

He and his father always comforted her, saying it was alright and that they shouldn't rush because they still had plenty of time.

A cold and sharp Crown Prince to others, he was nothing more than a puppy wagging its tail in front of his wife.