But having a boyfriend who'll be the next heir of a well-known business in Korea isn't that really great. That is Kim Jaejoong. Im Yoona thought that Jaejoong is the one whom she can spend her lifetime with for he is perfect for her - but it turned out that Fate isn't going along with them. Yoona thought it would be the end of her world after Jaejoong came out of life after hearing the news that he will be marrying another girl matched for him as soon as possible. Kim Jaejoong is now in-charge of the family business and for him to save the company he needs to marry Lee Ayumi, the daughter of the owner of  Lee Enterprise.

"I am so sorry for leaving you like this..I think I can't really make you happy. All I can give you is pain. But I really loved you so much"

He indeed loved her. But he is now torn in choosing between the love of his life or his family. With that, he needs to break up with Yoona which made her innocent heart broken into pieces. Im Yoona is such a beautiful, smart yet an innocent girl who just fell in love so quickly and just ended with her feelings shattered.

Kim Kibum is always there for Yoona. He is her best friend. He even cursed Jaejoong who is his cousin for breaking Yoona's poor heart. With Kibum's pure and caring personality, he's so protective with Yoona. But still he is hiding the fact that he's been loving Yoona ever since before Jaejoong came into Yoona's life. How can Kibum control his concealed feelings for her if Yoona is broken hearted and he has this feeling that he wants to protect her, to take care of her and wait for her even though he knows well how Yoona loved Jaejoong wholeheartedly? 

How can she even handle things up when she finally understood all the things that Kibum is showing her and when those concealed secrets are now revealed?

"The hardest thing to do is if you will choose between the one you love or the one who loves you so much.. If love is like this hard..I don't want to love again, I don't want to be hurt, I don't want to hurt other people, I don't want to have this feeling again. I'm afraid in investing so much love and to have the same kind of pain all over again.They say that love is sweet, love makes you happy. But the happier, the worst. The too much happiness that love can give..is nice but, love also gives too much pain.."

"The hardest thing to do is to love the one that will never return the feelings you have for her. I know she'll never love me back for she only sees me as a best friend of hers.Can I still love the one whom I know will not love me back?Can she still love the one whom she know that he will not be hers alone?I tried my best to forget her,I tried my best not to see her, I tried my best not to care. But how can I do it, If I can see her in pain? I can't love you but I still want to, and all I can do is to wait for you"

Kwon Yuri is such a bookworm. She's smart, talented and pretty. Besides being always on the top of the class, being a ballet dancer is a plus factor for her. She always hang out with her best friends Kibum and Yoona. She is also known in school. But this guy named Lee Jaejin became her rival in her studies. Ever since Jaejin came, he's been always on the top of the class. That started their small and maybe you can say as a childish fight. They hated each other. They never really became close. But when they reach college, Yuri was surprised that both of them got into the same school again. They even became classmates again. And the things heated up between them all over again. Never did Jaejin thought that he started to fall in love with the girl whom he hated at the very first place. He's really caring. funny and even one of the King of pranksters on their group,  but he's been hiding this kind of characteristics to keep away from the one he loves.  With Jaejin's cold and silent type personality when it comes to Yuri, he started to hide his feelings for her.

"The hardest thing to do is..to think of ways on how to forget her...I hated her and I can even curse her for being my rival. Things started bad on us. But as time goes by, its hard to get her out of my head, I'm now in-love with her, and by now it's hard to think of ways to show her how much I love her now that someone already taken her heart. I care but I can't show it, I thought it but it's still on my mind, I meant it but I never said it..."I Love You" saying those words..is the hardest thing to do"

"The hardest thing to do is...the homeworks in Math? I can't totally sleep if I can't have the highest grade in the class...I can't sleep if he wins over me...Haha.. it's just a childish thing right??I can see my best friend hurt all the time because of that Love thingy...but when I experienced it...I realized...as what others said...It's harder than math...I can't find the formula to solve it, I don't know the proper solutions and I don't know the proper equations.. Love may be scary, but let's give it a try right? I'm scared to be hurt, and it's just like to love is giving a person a chance to destroy you, but trusting them not to.."

Yuri never experienced love until Lee Donghae, a good looking guy with an outgoing personality and a good heart came into her life.  Donghae stayed in Japan for 10 years and moved to Korea for college. As soon as he get in his new school, he became more popular in just a snap. And it seems suspicious that Donghae's profile is hidden in school. Donghae came from a well-known and a wealthy family and to make things interesting, he is also a brother of Lee Jaejin and Lee Ayumi - which he hides for he wants to live in low profile to experience a simple life and to refrain from being treated like a God which is the life he used to.

JaeJin doesn't know why, but he is starting to feel the hurt and unexplainable feeling whenever they are around. As Yuri and Donghae started to fall in love, How can Jaejin handle his feelings? 

Will Yoona choose the one she love or the one who loves her?
Will Kibum still continue to love Yoona eventhough he knows she loves his cousin?
Will DongHae tell the truth?
Will JaeJin confess to Yuri?
Will JaeJoong choose Yoona or Ayumi? His family or the one he loves?