Kangnam is returning to Japan after 2 years! Kangnam visited his hometown for his mom's birthday and spends quality time with her. Kangnam is preparing a special birthday party for his mom! In particular, Hyun-moo joins in. Will their surprise birthday party be successful? Jung Wan, who will be the live radio DJ on behalf of Hyunmoo, is realizing that MCing is no joke. He's making mistakes from the start and losing his mind. Kim Yong Gun decided to make a special Christmas tree himself and remembers his childhood.