Yuri and Yunho were seperated twins. Their parents were killed. They were adopted by different family. Yuri was adopted by Kwon family whilst Yunho was adopted by Jung family when they were 5.   One day, Yunho open his old albums and saw his twins. Since that day, Yunho decided to find her. One day they (YunRi) met, without knowing they were twins. And more surprising, they will get married! 

Yuri and Tiffany were bestfriend when they were child. But their parents is too selfish and seperate them because of their hateness to each other. At the last time they met, they made a promise. A promise that they will meet again 10 years later at their secret place  . After almost 10 years later, they accidentally met but they never knew it. When they were officially meet, something unexpected happen.