kyuhyun and sungmin are bestfriend.....  sungmin loves kyuhyun since they became close..  but kyuhyun doesn't know it... one day kyuhyun parrent order kyuhyun to marry sungmin. they parrents know each other. they are business partner. though sungmin knows the reason behind the married which is business but she cant deny it that she's happy hearing it. but she's worried too. she knows that kyuhyun will hate it. and she's right. kyuhyun really hate it. not because he dislikes sungmin. but because the way his parrent treat him. he hates that his parrent who always control his life. he hates his parrent who always treat him as a heir of  family's company not as a son. he hates his parrent who make he feels useless all the time. but onece his parrent make an order, he can't argue it.  he just cant. so he wreaks it toward sungmin.

the hatred that he have toward his parrent causing him makes a mistake... a big mistake.. a stupidest mistake.. a mistake that make him regretting it for his rest of his life.