Lee Moon-se

파랑주의보

Jeon Yun-su

Cha Tae-hyun, Song Hye-kyo

Su-ho is a plain high school boy, and Su-eun is a bright and beautiful girl in the same school. For some unknown reason, Su-eun has a crush on the boy, and for equally mysterious reasons she rescues Su-ho in the sea though he doesn't know who actually saved him.