On September 1 episode of SBS' television show 'Running Man', the cast members were seen playing a game that required them to remain calm as long as they could.
They were given this special device to put on, which only turned green when they kept their composure and turned red when they lost it.
![Yu Jae Seok](https://img.sbs.co.kr/newimg/news/20190903/201350834_700.jpg)
The question was, "So, Kwang Soo. How is it going with Lee Sunbin these days?"
Attacked by Yu Jae Seok with an unexpected question, Lee Kwang Soo blushed hard and tried to calm himself down by sipping some cold green tea in front of him.
![Lee Kwang Soo](https://img.sbs.co.kr/newimg/news/20190903/201350831_700.jpg)
Then, Lee Kwang Soo burst out laughing in embarrassment and Yu Jae Seok satisfactorily grinned beside him.
![Lee Kwang Soo](https://img.sbs.co.kr/newimg/news/20190903/201350832_700.jpg)
(Credit= SBS Running Man, 'sunbin_eyesmag' Instagram)
(SBS Star)