Lee Si-eon

as Oh Seong-joon

as Self (2 episodes)

as Blind date (1 episode)

as Classmate

as Self (2 episodes)

as Self (12 episodes)

as Self (1 episode)

as Self - Traveler (25 episodes)

as Go Joong-do (12 episodes)

as Self (1 episode)

as Kang Min (16 episodes)

as Jang Seung-cheol (16 episodes)

as Self (2 episodes)

as Seong-min

as Wal (16 episodes)

as Jung-ho

as Astronaut (1 episode)

as Park Dong-cheol (16 episodes)

as Lee Hong-dae

as Im Byung-Min (26 episodes)

as Self (2 episodes)

as Kang Nam-il (18 episodes)

as Yong-Pal (16 episodes)

as Shin Ho-Bang (40 episodes)