“I have found someone I love. So please break off your engagement, young lady. “Huh? Your real name is …..” One day I was obsessed with a poor novel “River of Forgetting” and lived quietly as a duke’s daughter. I discovered that my fiancé was an ordinary person who was a main character. According to the original work, his love interest is a female protagonist and a saint, and I was engaged to a male lead…. A supporting character is destined to be assassinated without the knowledge of any mouse or bird, right? That night, I learned two shocking truths and confessed them to a man who was drunkenly passing by. I thought he looked like my favorite black character in this novel, the crown prince of Hyperion, Saul Lucius… . “Do you want to get engaged? Marriage or dating? An affair is fine…..” “Whatever.” This was Hyperion’s man. As a result, an engagement with a crown prince went smoothly… . But my fiancé who dumped me has become obsessed with me. Does anyone know why he’s like this…? Or rather, I’m engaged to a crown prince? Is that too much for a supporting role? Well, it seems like the real lead of this novel is different!