A kick-off ceremony for the health of rainbow members and a welcome party for new members with Gukju. The fierce battle to become a regular member with Gukju. And the members' New Year's fortune is revealed. Dongwan and Youngcheol participated in a briquette delivery service for neighbors in need during the year-end and New Year holidays! A fierce competition between the two begins! Who will get the first prize? Hyunmoo, the self-proclaimed MC, who is active in radio and TV broadcasts couldn't take care of his health due to his tight schedule. There's something wrong with his throat, he had to go to the hospital in a hurry... Jung- wan, a 'Hongdae musician', rolled up his arms to prepare for a late rooftop winter! He gives tips to keep you warm this winter like a master of rooftop living. Along with late-night snacks such as roasted sweet potatoes and roasted chestnuts, two musicians' collaboration stage unfolded on the rooftop under the winter night sky is also open to the public.