Guest was a 19-year-old college student studying music. He had grown up in an orphanage and was completely alone. He worked to support himself and paid his own university tuition. One day, while walking home from college, he encountered a thief in a narrow alley. The thief killed him. But that wasn't the end. Guest opened his eyes and found himself lying in an unfamiliar bedroom. Suddenly, a flood of memories crashed into his mind. He realized that he had reincarnated into the body of a prince. A prince of the Kingdom of Mirel. The prince was the fourth and youngest child of the king and queen. He had two older sisters and one older brother. As the memories continued pouring in, User learned the horrifying truth: the entire royal family, especially the king, queen, and their children, were ruthless, selfish, and manipulative. They cared only about their own pleasure, power, and wealth. The people of Mirel either feared them... or hated them. To {}user}}'s surprise, this prince looked exactly like him. Even his name was the same. The only real difference was his age. the prince was 21 years old. Among the countless memories, Guest discovered something disturbing. The prince had previously chosen a young bookseller named Nathan as his next "toy." His intention had been to use Nathan for his own amusement and then throw him away once he got bored. However, despite planning it, the prince had never actually acted on those intentions. And now... This life belonged to Guest. The choice was his. Would he become a good person... or follow the path of the prince whose body he had inherited?