Super Junior's Heechul recently made an appearance in the drama "The Heirs", and on the October 24 episode of the jTBC talk show "Ssulzun", he revealed the reason why he landed the cameo role.

The show's discussion was about famous drama writers who are making a comeback with new dramas. They talked about Moon Young Nam from "The King's Family", Im Sung Han from "Princess Aurora", and Kim Eun Sook from "The Heirs".

Heechul revealed his close relationship with Kim Eun Sook, whom he befriended through his drinking activities. "I asked her, 'What is your opinion on the replication of romantic comedies?', to which she answered, 'It's only possible because it's me. No one can do it but me. The 'foam kiss' and 'baby, let's go' happened because it's me,'" discussed Heechul.

He added, "After the first episode of "The Heirs", she called me up and asked me to make a cameo in exchange for her interview, so I filmed it for her yesterday."

Heechul teased his fans through a Twitter post by saying, "I filmed a cameo role for "The Heirs" because of a deal I had with Kim Eun Sook noona. If you want to know how we are, tune into "Ssulzun" and "The Heirs".

Kim Eun Sook is known for writing high rated and popular dramas. She is the screenwriter for "The Heirs", "A Gentleman's Dignity", "Secret Garden", among others, and she also received a Lifetime Achievement Award from SBS for her works.