THE KILLER THE AGENT AND THE MURDERE'S DAUGHTER

He was born to a loving mother, father, and brother. They weren't that rich but his parents could afford to buy everything he wanted. In short, he has a perfect family, but everything turned upside down, on the day when his both parents were murdered and he thought that his brother run away to save his own life. On that day, the sweet, loving, and carefree him changed. He becomes a person he never wanted. He is MATTHEW LEE, A.K.A, VIPER.

He was born to a loving parent, and a sweet, loving, and cute little brother. He has a happy and contented life. He was the protector of those who wanted to hurt his younger brother. He is his younger brother's hero. He admired and idolized him. He is dependent on him in everything he does. But his happiness was shattered when his parents were murdered together with his younger brother. After that, he only lives for only one goal in life to find the murderer of his family and avenge their death. He is ANDREW LEE.

She's the daughter of the number one drug lord in South Korea, but she doesn't have any knowledge about it. Spoiled brat, and always get what she wanted. "She is CATHRINE PARK.