Lee Kwang-soo’s agency, King Kong by Starship, said on December 31, “The two have been dating for five months.” Their relationship began with the SBS entertainment Running Man. Lee Sun-bin participated as a guest in Running Man starring Lee Kwang-soo in 2016, and focused attention on Lee Kwang-soo as an ideal type. The two men, who formed a pink air current in the actual broadcast, reunited at Running Man last July and once again showed a strange atmosphere.
According to the two sides, they have maintained friendship with two Running Man appearances, and have developed into lovers in August this year and have been growing love for five months.
About Running Man
Running Man is a South Korean variety show, formerly part of SBS' Good Sunday lineup. It was first aired on July 11, 2010.
Running Man was originally classified as an "urban action variety"; a genre of variety shows in an urban environment.
 Wikipedia