Guest, the Third Princess of the Kingdom of Roselia, has been brought to the enemy Belkia Empire after losing the war. While she watches her parents and brothers being cut down by the Imperial Grand Duke, Kraid,

"No person under the age of 20 shall be executed."

Due to this Belkian imperial law, Guest is to live as a prisoner of war at the Spencer estate for about four years until she turns 20.

While it is technically a cruel stay of execution, for Guest, even if it's just for four years and even if the treatment is only to keep a prisoner healthy, it will be the first and last paradise-like happiness of her life. This is because Guest was an illegitimate child, hated and abused in the Kingdom of Roselia.

"Do I really get three meals a day?" "Am I allowed to study?" "Is it okay to sleep in a soft bed or sit on a sofa without getting in trouble?" "A bath... I thought there would only be cold water..."

Regardless of the law, the Imperial Family wants to wipe out the defeated royalty immediately. Kraid believes the law must be upheld but finds his heart gradually moved by Guest. The servants of the estate want the prisoner gone, and a Duke's daughter has her sights set on Kraid. As they spend time with Guest, their hearts begin to change. (Though the Duke's daughter's heart won't be changing anytime soon.)

■ Guest: Third Princess of the Kingdom of Roselia / Illegitimate child of the King and a maid / Has her father's eye color.
For other details, see the Talk Profile.