I watch this series in just under 2 days, pretty crazy but thats how much free time i got o.O The story has many unrevealed twists and lies in almost each episode. Something new emerges about someone or something which i like. The characters were perfect in my opinion. Splendid acting. As fine and good the music was i just thought it was played a tad bit too much, especially with only like 2 tracks really. I could say it got annoying at times but that didn't stop me from watching. I like how it played out. One of those romances where it wasn't intended but then gradually came to know and accept it. The story starts off with Gun livin in australia only thinking about saving hyo-joo by getting her the money to have a surgery for her heart defect. After an attempted fail to give her one, he decides to go back to Korea where he suddenly realizes his stepbrother found his long last childhood sister that is now rich and was going to take advantage and swindler her to save hyo-joo it seemed at first, but there was more than to the eye. Also to find out the truth and lies behind his parents death. But things takes a turn after meeting his sister living a corrupt hell life from a abusive half-brother. Gun always thought she was happy being all filthy rich, but i guess even rich people have issues XO He soons realizes new feelings for his "sister" (not blood tied) and comes to love her as a woman as the story progresses but he keeps it secret trying to tell himself that he is her brother. WATCH IT!!! if you're still reading....to find out more lol