I broke off my engagement and left the country, and then the country was destroyed.

The Kingdom of Inatisa is surrounded by four major powers, and has a contract to entertain visiting kings of those nations in exchange for not being invaded. Marquess's daughter Karinna is engaged to the crown prince. She has been tasked with the work of entertaining kings from other nations, as the lazy crown prince dumps his responsibilities on her. Despite this, Karinna, who was the daughter of an established inn in her previous life, was happily fulfilling her duties. However, one day she is told that fewer kings from major powers are staying in the kingdom, and her engagement is broken off.