Lee Si-young, the national representative girl crush, scrambled to Running Man' in five years.
SBS Running Man', which was broadcast on the 9th, was decorated with 'mission year-end settlement' Race, which collects all of 'global failure missions' and re-enters.
Lee Si-young appeared as a Hidden team leader and surprised the members. "I wanted to be one team with you two; I tried not to open the car door when the other came," said Lee Si-young, who became one team with Haha Lee Kwang-soo.
Lee Si-young showed a Technique demonstration when he hit the back, saying, "I learn technology these days." Lee Si-young, who passed the tall Lee Kwang-soo smoothly, pointed to Kim Jong-kook.
As Kim Jong-kook caught behind, Lee Si-young pulled his hips back and flicked back just one arm to knock Kim Jong-kook over. The production team praised Lee Si-young's passion from the beginning with the caption, "This is a female class."