Prince Jung Yunho and Prince Kim Jaejoong have history so do Prince Kim Kangin and Prince Park Leeteuk, and then there's a love triangle between Prince Jung Siwon, Prince Kim Kibum, and Prince Jung Changmin. Lastly, there's something not yet developed between Prince Kim Yesung and Prince Park Ryeowook, or at least there's no feeling yet developed from the second Delphian Prince. These love stories and pasts haven't been revealed