Real Man is a South Korean variety show featuring eight male celebrities as they experience life in the military, which is mandatory for all mentally sound and able-bodied Korean men for two years. The show debuted on MBC on April 14, 2013, as part of the Sunday Night programming block. The last episode of season 2 aired in November 27, 2016.

Yook Sung-jae, also known mononymously as Sungjae, is a South Korean singer, songwriter, actor, host and entertainer. He is a member of the boy group BtoB and its sub-group, BtoB Blue. Aside from his group's activities, Yook has acted in television dramas Reply 1994 (2013), Plus Nine Boys (2014), Who Are You: School 2015 (2015), The Village: Achiara's Secret (2015), Guardian: The Lonely and Great God (2016), Mystic Pop-up Bar (2020) and The Golden Spoon (2022). He has appeared in several reality shows, including: Hitmaker, We Got Married, and Master in the House.