The Cold hearted yesung who's only do one night stands and The Playboy kyuhyun, who’s never serious about anything except his work, both of them spend one night stand with each other, Kyuhyun becomes interested in his night partner after an incident happened between them, he kept arranging for them to meet for several times by coincidence! according to him

Kyuhyun keeps suggest that they'll become partners every time they meet and be just like they use to be in the past, yesung keeps ignoring and refusing kyuhyun absorbed offer, especially if it’s just like the past that he’s being trying to forget for a long time now!

After refusing and fighting, and arguing with kyuhyun about his stupid offer multiple times, and for not wanting to repeat the past and loses his life style that he established by now, after much thinking yesung decided to give up and finally surrender and accepted kyuhyun offer, just to play with kyuhyun emotions and take his revenge, of what happened to him because of kyuhyun in the past

What will happen to them? Is yesung going to accomplish his plan and take his revenge on kyuhyun or will kyuhyun win and make his first love his lover for real this time?