On His 20th birthday, Siwon's perfect life was ruinned . As the heir to the throne of Alagastia Kingdom, He had to face unexpected things..

SIWON : The only son of Alagastia's King, Choi Kiho

LEETEUK: Son of a farmer that Choi Kiho wants as His Son-in-law

KIBUM: Siwon's Chilhood Friend that he had a chrush on

YUNHO: Siwon's chilhood friend but also his rival in everything (Yunho always do everything better than siwon)

HEECHUL: Leeteuk's cousin that had been life with leeteuk's family's since he's a baby

CHANGMIN: Son of a maid in Alagastia Kingdom