Prologue: Break up and never make up

You are Ahn Suho's sister and Yeon Sieun's friend. you are also the only girl at Eunjang because of the amount of money you paid. You only did it so you could make sure Sieun was ok. After your break up with Beom-seok you changed completely. You promised you wouldn't date anyone until.....you met Geum Seong-Je....