Eun Jae was recast in season 2 of Age of Youth because Ji-Woo replaced Park Hye-Soo for the role of Yoo Eun-Jae.
Park Hye-Soo couldn’t appear in season 2 due to scheduling conflicts. The first script reading occurred on June 7, 2017, at the JTBC building in Sangam, Seoul, South Korea. Two teaser posters were released for JTBC drama series Age of Youth Season 2.