Moon Jeong-hee

as Russian Crime Boss (1 episode)

as Kim Se-yun's Mother (1 episode)

as Yeo Sun-ok (10 episodes)

as Jung Mi-hwa

as Shin-hye

as Moon-jeong / 5F (8 episodes)

as Mrs. Bang

as Hye-jin

as Kim Young-joo (12 episodes)

as Jung-mi

as Kim Da-jung (10 episodes)

as Hyeon Ok [Jun U's mother] (1 episode)

as Shim Myeong-yeo (16 episodes)

as Jessica Lee (16 episodes)

as Kim Soo-min

as Kang Eun-ju

as Jeong-hye

as Kim Eun-ok (16 episodes)

as Ji-soo

as Hye-mi

as Self - Narrator

as Seo Ji-eun (24 episodes)

as Joo-hee