Song Geon-hee

as Young Baek Sang-gil (1 episode)

as Lee Ki-bum / Cha Young-beom (12 episodes)

as Gi-hun

as Dal's blind date (1 episode)

as Self (8 episodes)

as Kim Tae-sung (16 episodes)

as Lee Hyul (16 episodes)

as Moon Ja-hoon

as Seo Yeo-reum (8 episodes)

as Thomas (26 episodes)

as Yi-hon (12 episodes)

as Jeon Hwang-tae (32 episodes)

as Kim Moo-gil (Young) (4 episodes)

as Marx (8 episodes)

as Self (3 episodes)

as Black Tongue (2 episodes)

as Park Young-jae (20 episodes)

as Gwon Gi U (10 episodes)

as Freshman (2 episodes)

as Lee Ri Eon (2 episodes)