Lee Kai (Kim Jongin)

The son of Lee Taemin and Kim Hyoyeon , he was an orphan along with the brothers Lu han and Se hun. He seek's for revenge for his fathers death and his lost mother on whom he believed abandoned him and his father. Prior to the events of the story he hid himself in the name Lee Kai , so that the government or the world would know that He is the son of hyoyeon and taemin.

Kim Hyoyeon

The mother of Kai and the ex-lover of Taemin , before taemin died she had an offspring with taemin which is Kai , after she gave birth she abandoned Kai and Taemin. Years passed and she met Eunhyuk and they also had a child together which is Changmin. She is not just a singer but she is also a police officer when she is not on stage.

Lee Changmin

Lee Changmin is the son of Hyoyeon and Eunhyuk and is also the Heir to the Lee corporation , He is a somewhat stubborn kid and also a naughty one. He always dreamed of having an older brother to rely on.

Lee Hyuk-Jae

Eunhyuk is the CEO and manager of the Lee corporation , he is a drug dealer on which hyoyeon nor changmin know. He is the best friend of taemin, before taemin died they we're like brothers not until jealousy filled him when taemin was getting the attention. He killed taemin by shooting him in the chest, he is planning to kill Kai so that hyoyeon will not know that he killed taemin.

Lee Taemin

He is the father of Kai and ex-lover of Hyoyeon , he was killed by Eunhyuk , before his death there was a hidden message in his coat. In which Kai treasures the most before he "died".

Lu Han and Se Hun

Lu Han and Se Hun we're orphans from busan , they lost their parents in a car crash , as Kai was wandering around the street of busan he found them and symphatized with them because the three of them lost parents at a young age. The three became bestfriends and The brothers aided Kai to seek Revenge.

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------