Dong Bang Shin Ki fondly calls their fans, Cassiopeia. But how did they come up with that name? To them, What exactly is Cassiopeia?   

She is the Queen of Matchmaking.  He is the Prince of Love.    She's never failed before. He's never fallen in love.    She vowed to make him fall. He promised he'll never love.     In this game of matchmaking, is it a Love Match...   Or    

  Between the past and the present, what will you choose? Between your old love and new love, who will you choose? Between your memory and your future, what will you save? Is it true that first love never dies? Or is love sweeter the second time around?

The crime had been done. The question is: who stole Shim Changmin's chocolate?