The One and Only

Eun-Jin Ahn

Pyo In-sook

Kim Kyung-Nam

Min Woo Cheon

Su-Young Park

Seong Mi-do

Ye-won Kang

Kang Se-yeon

Du-shim Ko

Yook Seong-ja (In-sook's grandmother)

Sang-woo Do

Jo Si-yeong

Ahn Chang-hwan

Sin Tae-il

Bo-ra Yoon

Sister Veronica (Nun of Hospice 'Morning Light')

Seo Yeon-Woo

Ha San Ha [a child in same neighborhood with Insook]

Lee Seung-joon

Guseong Gang member

Choi Young-Woo

Park Seung-seon

Joo In-Young

Cha Yeo Wol

Hyun-Sung Jang

Pyo Kang-seon (In-sook's father)

So Hee-jung

Moon Young-ji

Lee Hang-na

Choi Seong Hae

Byoung-Sook Sung

Oh Cheon-deok

Han Kyu-Won

Oh Young Chan [Se Yeon's husband]

Lee Soo-Mi

Sister Magdalena [Director of Hospice 'Morning Light']