• Song Joong Ki arrives for the 49th Paeksang Arts Awards on May 9, 2013 in Seoul, South Korea.

Song Joong Ki arrives for the 49th Paeksang Arts Awards on May 9, 2013 in Seoul, South Korea. (Photo : Getty Images/Chung Sung-Jun)

Song Hye Kyo's "Descendants of the Sun" co-star Song Joong Ki and "The King" star Jo In Sung recently helped "Hwarang: The Poet Warrior Youth" star Lee Kwang Soo buy a sofa. This all happened in the episode of "Running Man" that aired on March 19, Sunday, on SBS.

Aside from Joong Ki and Jo, the "Running Man" episode also featured "Moonlight Drawn by Clouds" star Park Bo Gum. The three actors and Lee were tasked to the members go out and find items for their new safe house in the episode.

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Lee's task was to find a sofa so he called his father to borrow one from his company. His father was willing to help but he asked something in return. The "Running Man" star had to get Joong Ki and Jo's signatures because his father's employees wanted them.

First, Lee called Jo and jokingly told the "The King" star that he did not want to buy anything and he could just leave the package in front of his door. The latter also jokingly replied that he got rid of his signature and he only does shake hands now but later on gave his signature.

Afterwards, Lee called Joong Ki. The latter said he needed to go to Gwangju in Gyeonggi Province so he was worried because he had no idea how he could get the signature to the former on time.

It was Lee who came up with a solution. He drove straight to Blossom Entertainment and was able to obtain a signed DVD set of "Descendants of the Sun" from Joong Ki.

While in Blossom Entertainment, Lee rain into Park. The "Running Man" star took the opportunity to get the signature of "Moonlight Drawn by Clouds," as well. In return, Lee signed his "Running Man" name tag and gave it to Park.

Eventually, Lee was able to get a sofa from his father and gave signatures from Joong Ki, Jo and Park to his father's employees. Meanwhile, here is a video of Joong Ki and Park at 2016 KBS Drama Awards: