18 Again

Lee Do-hyun

Hong Dae-young / Go Woo-young· 16 ep

Kim Ha-neul

Jung Da-jung· 16 ep

Yoon Sang-hyun

Hong Dae-young (37 years old)· 16 ep

Roh Jeong-eui

Hong Shi-ah· 16 ep

Ryeoun

Hong Shi-woo· 16 ep

Wi Ha-jun

Ye Ji-hoon· 16 ep

Kim Kang-hyun

Go Deok-jin· 16 ep

Lee Mi-do

Choo Ae-rin· 16 ep

Han So-eun

Young Jung Da-jung· 16 ep

Choi Bo-min

Seo Ji-ho· 16 ep

Hwang In-yeop

Goo Ja-sung· 16 ep

Kim Yoo-ri

Ok Hae-in· 16 ep

Lee Ki-woo

Choi Il-kwon· 16 ep

Ahn Nae-sang

JBC Director· 16 ep

Yoon Byul-ha

Ye Seo-yeon· 16 ep

Ko Eun-min

Lim Ja-young· 16 ep

Woo Sang-hee

Seo Soo-rin· 1 ep