Gi So-you

as Yoo Bo-na (young) (2 episodes)

as Child Baek Ah-jin (2 episodes)

as Child Yoon Yi-rang (7 episodes)

as So-hyun

as Young Yoo Je-na (2 episodes)

as Yoo Byeol (12 episodes)

as Bok I-na (child) (2 episodes)

as Lee Seung-mi (1 episode)

as Capital Kid

as Yoon Cho-won (young) (12 episodes)

as Lee Ye-jin (14 episodes)

as Kim Min-ah (12 episodes)

as Kim Tae Joo [Young] (51 episodes)

as Chae Kyung (12 episodes)

as Jo Min-ha (1 episode)

as Son Eun-gi (20 episodes)

as [Restaurant kid] (16 episodes)

as Chae Rim [Young] (16 episodes)

as Na Eun (16 episodes)

as Seung-chae (1 episode)

as [Lee Man Jin's third daughter] (16 episodes)

as Kang Cho Hong [child] (12 episodes)