The Rainbow Club members celebrate the 400th episode with congratulatory messages from celebrities. Jun Hyun Moo is the special guest of the 400th episode. Hyun Moo is currently living in a hanok because his house is under construction. Hyun Moo cares about his health now. He starts his day by stretching, and he even makes a detox soup. Additional Cast - Yoo Jae Suk + Song Seung Heon + Lim Young Woong + Daniel Henney + Ro Hong Chul + Lee Si Eon