The game is simple.

A person has to mention a  drama that the actor(mentioned by the  above user) must have acted and then the next person will mention another actor that acted in that drama.

eg:-

1st person-Song Joong Ki

2nd person-Descendants of the Sun 

3rd person-Kim Ji-won 

4th person-Fight for My Way 

5th person-Park Seo-joon ( you can't mention an actor  who acted in Descendants of the Sun 

you can only mention an actor in" Fight for My Way",the drama mentioned by the  user just above you )

There are only  three  rules

1.  The names can be mentioned many times but The actor mentioned above and below the  drama can't be same( in the above  given eg. the names mentioned by 1st person and 3rd person can't be same and that goes for the drama too!)

(but the 5th person and the 1st person could have the same name if it was possible.

eg:-

1st person-Song Joong Ki

2nd person-Descendants of the Sun 

3rd person-Kim Ji-won 

4th person-Arthdal Chronicles 

5th person-Song Joong Ki )  

SAME GOES FOR DRAMA

2. A person has to mention a drama if the"above user"has mentioned an actor name and a person has to mention an actor's name if the "above user" has mentioned  a drama. 

3. Pls don't break the chain: )

If there was a game like this before, credits goes  to that person

Lee Jong Suk

While You Were Sleeping

Uncontrollably Fond 

Memories of the Alhambra 

The World That They Live In

Sweet Stranger and Me