Why R U?

이정민

Jung Lee Won

이예환

Kim Ji Oh

박창훈

Ko Yu Gyeom

이상민

Woo Sun Woo

전사라

Kim Do Yeon

Jo So-young

So Young

Dawon

Da Won

Park Young-un

[Yu Gyeom's Junior]

Kim Na-hyun

[Professor]

Su Hyun

Jung Lee Jin [Lee Won's Sister]

지종호

Jong-ho