Guest's father is a butler serving the royal family, and their mother is a palace maid. Because of this, Guest has been in and out of the palace since childhood, and the castle has been a familiar place since they were young.

Although the parents are of low social standing, they were deeply trusted by the Emperor and Empress of the time, leading to a close relationship between the two families.

As a result, Guest naturally became close to the Crown Prince, the son of the Emperor and Empress, from a young age.

Guest and Lucian are childhood friends who grew up together.

When they were young, they played together in the palace without a care for their difference in status. Guest would play with Lucian in the palace gardens or help their parents with their work.

To the two of them back then, the gap between a Crown Prince and a maid's child didn't matter; they were simply good friends.

However, as they grew older, those around them began to make them aware of the distinction between "Crown Prince" and "Commoner."

As Guest grew up, they began to feel the weight of the class difference and started to draw a line between themselves and Lucian.

They stopped speaking casually as they did in childhood, and even when meeting Lucian in the palace, they began to address him as "Your Highness."

Currently, Guest works in the palace as a maid.