Dear X

Kim You-jung

Baek Ah-jin· 12 ep

Kim Young-dae

Yoon Joon-seo· 12 ep

Kim Do-hoon

Kim Jae-oh· 12 ep

Lee Yul-eum

Lim Le-na· 12 ep

Kim Yu-mi

Hwang Ji-seon· 11 ep

Kim Yi-kyeong

Sim Sung-hee· 8 ep

Kim Ji-young

Seo Mi-ri· 8 ep

Hong Bi-ra

Moon Do-hui· 8 ep

Son Kang-gook

An Do-gang· 6 ep

Kim Ji-hoon

Choi Jeong-ho· 5 ep

Ryu Kyeong-hwan

Im Hui-guk· 5 ep

Hong Jong-hyun

Moon Do-hyeok· 5 ep

Kim Il-woo

Hong Su-hyeok· 5 ep

Bae Soo-bin

Baek Seon-gyu· 4 ep

Hwang In-youp

Heo In-gang· 4 ep

Hyun Seo-ha

Seok Hyang-i· 4 ep

Jeon Kuk-hwan

Jun-seo's Grandfather· 4 ep

Lee Woong-jae

Heo In-mo· 4 ep

Kim Min-song

Tattoo Man· 4 ep

Kim Nam-hee

Documentary Host· 4 ep

Kang Ian

Art Teacher· 3 ep

Park Seoung-tae

Heong Gyeong-tae· 3 ep

Shin Mun-sung

Park Dae-ho· 3 ep

Park Seung-wan

Jo Yoo-sik· 3 ep

Lee Seo-an

Lim Sun-ye· 2 ep

Gi So-you

Child Baek Ah-jin· 2 ep

Park Hoo

Child Yoon Jun-seo· 2 ep

Go Seo-hee

Madam Gong· 2 ep

Park Bu-keon

Director Park· 2 ep

Bae Jin-ah

Mrs. Kwak· 2 ep

Jo Hyeon-jin

Sim Sung-hee's Mom· 1 ep

Yoon Joo

Class Teacher· 1 ep

Kwon Su-yeon

Yu-bin· 1 ep

Shin Eun-hye

Ga-yeong· 1 ep

Woo Doo-yeon

Ethics Teacher· 1 ep

Baek Sun-ho

Xanadu Coffee customer· 1 ep

Jung Woo

Seol Yeong-uk· 1 ep

Choi Sol-hee

Jae-oh's Aunt· 1 ep

Yoon Hyun-soo

Ryu Ji-hyeok· 1 ep

Kim Se-yoon

Detective· 1 ep

Lee Seung-jin

Detective· 1 ep

Kim Sang-il

Im Seung-yong· 1 ep

Choi Jae-yoon

Child Kim Jae-ung· 1 ep

Gu Bon-jin

Jae-oh's Father· 1 ep

Cho Mi-yeon

Host· 1 ep

Kim Kyu-do

CEO of Dio Entertainment· 1 ep

Oh Jae-se

Detective· 1 ep

Ma Jeong-pil

Sim Sung-hee's Dad· 1 ep

Jeong Jong-hoon

Principal· 1 ep

Jeong Eun-ran

Housekeeper· 1 ep

Choi Ji-yeon

Reporter· 1 ep

Park Seong-gyoon

News Editor· 1 ep

Son Gun-woo

Director· 1 ep

Im Yu-ran

Convenience Store Owner· 1 ep

Park Dong-il

Mrs. Kwak's Husband· 1 ep

Seo Chae-han

Class President· 1 ep

Jang Eun-seo

Neighbor· 1 ep

Kim Min-che

Neighbor· 1 ep

Yeo Dae-hyun

Detective· 1 ep

Kim Jae-il

Internal Affairs Officer· 1 ep

Seo Hye-jin

Staff· 1 ep

Lee Dong-kyu

In-gang's Manager· 1 ep

Hong Min-gi

Man 1· 1 ep