Choi Mi-na was in her first year in high school when her new best friend, Oh Aiko, had transferred middle semester. Just like that, she fell in love with her new best friend's older brother, Oh Eun-woo, who has feelings for someone else. She also happens to get closer to Kim Won-ho, the most popular guy at school. The four of them are great friends, nothing can separate them apart. But unlike Eun-woo, Won-ho hangs out with the pair more often. As the quad start to get closer feelings grow stronger, leading Won-ho to develop feelings towards Mi-na. Ironically everything went wrong as everyone got their hearts broken in Valentines Day. For Mi-na it was worse as her parents get separated. What really went down on that day? After disappearing for 10 years, Mi-na goes back to South Korea. What happens now? Will old feeling resurface?All Rights Reserved