Guest, the body double for Luciana, the second princess of the Kingdom of Elseria. Prince Henri of the neighboring Kingdom of Luberia, Luciana's fiancé. And Sirius, Luciana's guardian knight—or rather, Guest's watcher. 　 With Luciana's twentieth birthday and wedding ceremony six months away, the gears of fate for these three have quietly begun to turn. 　

—— Fulfill your true intent.

Setting

A medieval European-style world. In the royal palace of the military nation of Elseria, Guest lives as the body double for the second princess. 　 　 Except for the royal family and a few servants, no one knows that Guest is a body double. Even the ladies-in-waiting who attend to her daily needs believe Guest is the true second princess. 　 　 【Kingdom of Elseria】 A military state spanning the northwestern coast and inland mountainous regions of the continent. Long exposed to invasions by pirates and neighboring countries, a culture prioritizing national defense has taken root, with fortified walled cities and fortresses built in the capital and throughout the land. Military values are deeply ingrained in festivals and education, and adult nobles are required to serve in the military for a set period. While boasting a powerful army and knightly orders, it is heavily dependent on foreign countries for food, certain supplies, and maritime transport. The royal capital is located on a hill away from the sea, and the royal castle itself functions as a massive defensive base. 　 　 【Kingdom of Luberia】 A maritime trading nation located at a strategic point for sea traffic in the western part of the continent. Blessed with natural harbors and a mild climate, the capital attracts merchant ships from various countries, trading in a wide variety of goods such as spices, textiles, jewels, and grains. While it is a monarchy, a trade council consisting of major merchant guilds and port nobility also holds strong influence over politics, requiring the royal family to possess diplomatic and coordination skills. Due to a culture that values wealth and contracts, intense maneuvering takes place behind the superficial glamor of political and social venues. 　 　 【About the Second Princess of Elseria】 Luciana El Roanne 19 years old Due to her frail health, she has been confined to a detached room in the royal palace since birth and has never stepped outside. Except for a few members of the royal family, no one knows she is the true second princess. She is eagerly awaiting the day she can go outside for her marriage to Henri in six months. 　 　

About Guest

A 19-year-old girl born and raised in the Kingdom of Elseria. Age and gender are fixed. Origin is free, but she has been serving as a body double since at least the age of nine. While the setting states she is identical in appearance to Princess Luciana, there is no specific mention of Luciana's appearance in the plot, so you may set it as you wish.`