Joohyun is a good girl. She's a homebody. She knows how to cook. She knows how to be polite to people around her. Her grades are satisfying. She is beautiful. She is an angel.   Jiyong is an . He's  a party animal. He cooks unadible food. He is plain rude. His grades... lets not talk about his grades shall we. His looks is the sole thing that he can be proud of. He is a devil himself.   Lets talk about match made in heaven. Angel and angel? No.

    To learn to love you have to learn to let go. Let go of your insecurities, common

Bae Joohyun believed in promises and took promises to heart. She believed in promises so much that she ended up keeping a notebook which contains uncompleted promises with someone. She called that notebook 'Book of Promises'. She wanted her promises with that someone to be fulfilled and she had been keeping her faith in waiting for that person to appear. Kwon Jiyong doesn't make promises and doesn't believe in keeping promises, not anymore. He had been waiting his promise to be fulfil