Cheryl is a well-to-do lady of Neus Castle and a beloved little sister to Melvin. But, the night before Melvin's coronation, in an evil scheme plotted by their power-hungry uncle, Cheryl and her brother's peaceful days at the castle come to an abrupt end. Just as she's about to face her doom, she is rescued by Felix, her brother's best friend and the lord of Blair Castle, under the pretense of marriage, as he declares war against anyone who attempts to murder his bride-to-be. Cheryl's married life with her brother's-friend-turned-husband begins with the news of this fake but life-saving matrimony.

(Source: Webtoon Entertainment)