A snow-covered country ruled by the royal family of Silevis all year round. In order to prevent the mixing of foreign blood and maintain the purity of the direct bloodline, the system of incest is implemented. The princess is not allowed to step out of the palace. As a result, the number of royal family members decreases year by year. The only royal daughter of this generation, Silevis? At the age of 12, Shui was smuggled out of the country by the queen who had failed in her pursuit of freedom, and met "Blade", a member of the C country mercenary organization "Black" by marriage. In short, it is a joyful love story in which a cold uncle fights off his fiancé Brother Wang, goes through an extraordinary life, and finally returns home with a tsundere Lolita.