Siwon and Yoona were the perfect couple you can ever imagine. They always smiled and enjoyed each others company. Everyone knew this because they never fought or cried because of each other. Nothing can go wrong, right? Wrong. Everyone was wrong. One day, Siwon dumped Yoona for an unknown reason. After that day, Siwon left without telling anyone where he went. Yoona felt heart-brokened and betrayed, which made her join a secret group called, "H3art-Br3aker" (Otherwise known as "Heart-Breaker.") Basically, members of "H3art-Br3aker" date a guy (or girl), and break their hearts at the end. This makes the person feel the exact same way as one of the "H3art-Br3aker" member felt when they were heart-brokened. Once the member had broken someones heart, they must have a new location and start over again.6 months passed ever since Yoona joined the group, and Yoona has broken at least 15 guys heart. She just moved to another school, and found out that Siwon went to the same school, too.In the other hand, Siwon was part of another secret group called, "C.H.A.N.C.E." Basically, the group "C.H.A.N.C.E" had to fix other peoples heart and capture members of "H3art-Br3aker" so that they could stop breaking other peoples heart. So, they were the good guys, you can say.Will the two "used-to-be-perfect-couple" get together again? Or will Yoona get revenge on Siwon? ForewordA/N: Hello! Thank you so much Karen17740x for making this awesome poster! ^^ (Poster By: Karen17740x)"Its him!""Who? Where?""Over there-- Choi Siwon. The guy who broke my heart. Also my first victim in this school."- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "Is it really you?""I dont know who youre talking about. Just leave me alone!""Its really you! You know how much I missed you?""Ha, suree. And here, youre kissing some girl I dont even know. You call that missing me?""What...? Oh, her? I cant exactly explain whats going on between her and me, but were not in relationship!""Save your excuses later. I dont care about you anymore."- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -"Shes one of them?""Release her, shes a weakling.""But sir, what if she gets stronger?""Then Ill take care of her. I broke her heart once, and if Kikwang breaks her heart, she wont be the same."