Actor Lee Sieon (이시언/이보연) who is a regular cast member in "I Live Alone" (나 혼자 산다) hosts a housewarming party to celebrate the purchase of his newly built apartment in Sangdo-dong, Seoul. The other Rainbow Club members are invited, including comedian Park Nara (박나래), webtoon artist Kian84 (기안84/김민희), singer and member of Mamamoo Hwasa (화사/안혜진), singer Henry (헨리) and actor Sung Hoon (성훈/방인규). The cast members are impressed by the modern and spacious apartment which includes a playroom of figurine treasures and retro games, as well as the change in Lee Sieon's attitude towards cleaning. In contrast to the previous infamous, dirty rented apartment in Sangam-dong, Lee Sieon now cleans daily to maintain the immaculately clean condition so much so that he jokes he feels like it is a hotel that he has to check out of at 10am everyday. The cast members are treated to a feast including Lee Sieon's favourite dish of homemade janchi guksu topped with fresh crabs, and play various games including the challenging attendance game, chulseokbu (출석부), which leaves all the members breathless.
