Fans have been anticipating the appearance of "Moonlight Drawn by Clouds" star Park Bo Gum in "Running Man" ever since it was announced a few weeks ago and on the March 18 episode, it finally happened. But fans were in for an even bigger treat because not only did Park Bo Gum make an appearance but celebrities like Jo In Sung and Song Joong Ki also joined the episode.

Prior to the episode's airing, preview stills of Park Bo Gum wearing Lee Kwangsoo's nametag surfaced on the internet making fans even more curious as to what his participation will be. It turned out that it involved a mission assigned to Lee Kwangsoo, reported One Kpop.

According to a report by Soompi, the mission assigned to Lee Kwangsoo was to get a sofa. Running Man's resident Giraffe quick-wittedly thought of asking to borrow one from his father. Apparently, there are no free lunches in the world and even family connections aren't enough to get the favor for free.

Kwangsoo's dad agreed to loan his son the sofa at a cost - autographs from Jo In Sung and Song Joong Ki that his employees wanted. So the mission for the sofa resulted in yet another sub-mission and Kwangsoo was left with no choice but to call his buddies Jo In Sung and Song Joong Ki for the autographs.

Jo In Sung made his friend sweat a bit when he received the call by pretending he was talking to a sales agent and a delivery man, saying that he refused to buy anything and leaving instructions to leave the package at the door. He eventually gave Kwangsoo the autograph he needed amid much laughter.

Song Joong Ki, being Kwangsoo's best friend, wanted to help him out straight way but he was worried if he would be able to get the signatures on time to his friend because he needed to head out for a schedule. Kwangsoo volunteered to pick up the autograph from Blossom Entertainment's office.

It turned out that his visit to Blossom was a stroke of luck as he also bumped into Park Bo Gum. Kwangsoo asked the Moonlight Drawn by Clouds for his signature which he readily gave so in the end, Kwangsoo has Jo In Sung and Song Joong Ki's signatures to trade for the sofa to complete his mission.