Overview: In this episode, Jae Seok, as a DJ, prepares a radio show to cheer up those who work the night shift. He is joined by Seok Jin, Sang Yeol, Sae Ho, and other guests to come up with his unique style of an energetic night radio show. Meanwhile, Jae Seok visits Professor Kim Kwang Min, HYUKOH, and the team “Mamma Mia! to recruit them for the upcoming “Room Concert”.