The main girl's older twin brother is an enhanced human. People like him are genetically engineered as a human survival project. She is constantly being compared to him and is always trying her best to catch...

Princess of romance, Hwi-Kyung. The handsome, wolf-like, Three Musketeer guys who run to Hwi-Kyung wherever she is. They make a secret promise without Hwi-Kyung knowing. If one of them starts to love Hwi-Kyu...