Kim Jong Kook credited Lee Kwang Soo and Lee Sun Bin's relationship to 'I Can See Your Voice'.

On the April 12th episode of the Mnet show 'I Can See Your Voice 6', Kim Jong Kook brought up Lee Sun Bin's past appearance on the third season of 'I Can See Your Voice', saying, "Would Lee Sun Bin have been able to love if she didn't appear on 'I Can See Your Voice'?"

Yoo Se Yoon then said, "You don't know that. You should ask her boyfriend why it became like this," and Leeteuk added, "You're the only one who could say things like this," cheering on Lee Kwang Soo and Lee Sun Bin's relationship. 

Kim Jong Kook expressed, "I'll tell him later. 'You need to know. If it weren't for this show, you wouldn't have turned out this way,'" and Leeteuk said, "She appeared on this show, and that's how she was able to appear on 'Running Man'."

In related news, Lee Kwang Soo and Lee Sun Bin went public with their relationship in December of 2018.