18 어게인

Lee Do-hyun

Hong Dae-young / Go Woo-young

김하늘

Jung Da-jung

윤상현

Hong Dae-young (37 years old)

Roh Jeong-eui

Hong Shi-ah

Ryeoun

Hong Shi-woo

Wi Ha-jun

Ye Ji-hoon

Kim Kang-hyun

Go Deok-jin

Lee Mi-do

Choo Ae-rin

Han So-eun

Young Jung Da-jung

Choi Bo-min

Seo Ji-ho

Hwang İn-youp

Goo Ja-sung

Kim Yoo-ri

Ok Hae-in

Lee Ki-woo

Choi Il-kwon

Ahn Nae-sang

JBC Director

윤별하

Ye Seo-yeon

Ko Eun-min

Lim Ja-young