My choice cast: Jo Soo Min (Min Seol Ah-Penthouse) - Shin Chae Kyung Lee Do Hyun (Hwang Hee Tae-Youth of May)- Lee Shin Lee Shin Young-Lee Yul Kang Mi Na - Min Hyo Rin
I think there is another main/lead role for an actress who plays the the female prosecutor.
Kim So Yeon is a very flexible actress because she knows how to act as a good woman or a bad woman that's why she won an award at Baeksaeng Arts! Kim So Yeon have acted as a prosecutor in Princess Prosecutor
I wish there is a remake of this one with less episodes and more plot twist... it would have been better if the story would start in the present day and the flashback of their younger years and past.
Jo Soo Min (Min Seol Ah-Penthouse) - Shin Chae Kyung
Lee Do Hyun (Hwang Hee Tae-Youth of May)- Lee Shin
Lee Shin Young-Lee Yul
Kang Mi Na - Min Hyo Rin