Ji Yong is Dara's ex boyfriend when they are still in elementary, he broke up with her because his friend told him that Dara is cheating on him,but actually, she don't. Dara can't believe he dump her because he doesn't trust her, so when Ji Yong tries to apologise,she can't forgive him. She decided to go away from him by go to different school with him. After 3 years, they met again in Senior High, Dara has a boyfriend now, but Ji Yong still in love with her. He can't let go his first love, he believes that met her again is a sign that she is his true love, so he tries to get her back whatever it takes!