This review is based on two facts: A great revenge story and a horrible romance story. That's the only way to classify it. The beginnings showed us how great this drama could have been with the younger actors of Lee Hyun Woo and Im Woong Jae who did a phenomenal job of the teen Jang Il and Sung Woo. They did such a great job, I really wasn't ready for the lead stars to take over, sadly! But when they did, it was like gang-busters! Uhm Tae Woong and Lee Joon Hyuk gave stellar performances. Follow that up with the performance of Im Jung Eun as Soo Mi, it could have been the perfect cast; unfortunately, a big whole was left by Lee Boo Young's lackluster performance. As the college Ji-Won, she was very good but as later years Ji-Won, she was just there and frankly, could have gone missing the rest of the drama and no one would have cared. I think the true romance was the bromance between Sun Woo and Jang Il as they worked through their monumental breakup!! C'mon, its not that easy to forgive someone for trying to kill. But overall, its worth watching!