Why R U?

Lee Jung-min

Jung Lee Won· 8 ep

Lee Ye-hwan

Kim Ji Oh· 8 ep

Park Chang-hoon

Ko Yu Gyeom· 8 ep

Lee Sang-min

Woo Sun Woo· 8 ep

Jeon Sa-ra

Kim Do Yeon· 8 ep

Jo So-young

So Young· 8 ep

Dawon

Da Won· 8 ep

Park Young-un

[Yu Gyeom's Junior]· 8 ep

Kim Na-hyun

[Professor]· 8 ep

Su Hyun

Jung Lee Jin [Lee Won's Sister]· 8 ep

지종호

Jong-ho· 8 ep

Natasit Uareksit

[Himself]· 1 ep

Kornthas Rujeerattanavorapan

[Himself]· 1 ep

Kim Dong-Kyu

[Professor]· 1 ep

Bang Jin Won

[Unknown Classmate]· 1 ep