It's a promise that Seohyun made to herself for 10 years. She kept up with it, going overseas for 10 years.. Just for him. Going through every possible method to train herself.. Just to become a beauty. For him. And when she finally meets him after 10 years, she caught his eye, just like what she swore to herself.

&/CHARACTERS ;

Seohyun;

Comes from a fairly rich family. 10 years back, she was the ugly duckling of the neighborhood and the school. 10 years later, she returns as the school belle. She's the kind who would definitely fulfill her promises, and if she says it, she does it.

Kyuhyun;

The hottest and richest boy in school, no matter whether it was 10 years back or it was 10 years later. Charming, yes. Personality, no. He's a big playboy, and almost every girl in the neighborhood is head over heels with him, although he plays around with most girls. Who would've thought there's actually someone in love with him, but not for his looks?

Sooyoung;

Pretty, but refined and matured. She's Seohyun's best friend and has always been the one who Seohyun confides in. Sooyoung's trustable and a very good friend. It was her who encouraged Seohyun to go on her '10 Year Deal'.