The Yukari Act - A law enforcement put in place as a countermeasure to South Korea's dangerously declining birth rate. By taking science into account, every individual in the country are analysed from preschool age to match their personalities perfectly, thus resulting in two successful arranged marriage generations. Follow the adventurers of Bae Joohyun and Oh Sehun as they discover a predetermined love.  

Sehun's played the game all too long; chasing girls till they bent to his will, and then dropping them off never to hear from him again. But what happens when he meets the one he doesn't want to let go? Surely, old streaks die hard, and Sehun's past is about to make a comeback.