These are simply my thoughts about the main characters and the drama overall... I LOVED IT...sincerely I loved every minute of it...the the Idea of revenge in itself isn't something new but still the plot was tight and I felt hocked to the story... I was already a fan for writer Lee's dramas "Sang Doo let's go to school, Sorry I love you... So I prepared myself for something full of emotions that will make me shed tears and I wasn't disappointed... the truth is that it was a lot more better than what I expected it to be ^^... Kang Ma Roo: I was in love with that character it seemed a bit "stupid" for me it resembled Love more than revenge...and after few eps I started understanding it more...he was in love with Jea Hee and he understood her more than any one else he knew what she passed through during her childhood... Ma Roo always protected Jae Hee since they were children he believed she was the Love of his life...every dream he from his childhood included her and he couldn't make anyone else take her place in his heart...Until he met Eun Gi... even though it was supposed to be for revenge...it really wasn't like that because all what Ma Roo really wanted was to have Jae Hee back... the story goes on and some bad events happen and that makes Ma Roo carries some feelings - out of guilt - for Eun Gi that sooner turns into Love that he will be ready to give his life for her and prays that he dies and then in another new life they would fall in Love again like normal people. **one last thing to mention is that Song Joong Ki proved that he is a brilliant actor and not just a handsome face by playing that complicated character that good (that review is not full)