does anyone know about kim and his story?

Kim (kinn's younger bro) is always like a question mark for me! He appears suddenly in episodes and detects something related to his own father deeds! Like Why he is doing this behind his own family! Why he is ignoring porschay? Is there any novel or any story related to him?

 Lee C:

There are plenty of websites, I have just discovered that deal with so many angles of this show, it would take a day to get through them. 

From recaps, to who is who in both major and minor family to what the actors think of each scene and so on and so on. surely you will find your answer on YouTube! 

please share those websites when you are free, I am really confused about the story lol!