Principal Cast
Cho Jin-woong
as Won-ho
Ryu Jun-yeol
as Seo Young-rak
Kim Joo-hyuk
as Jin Ha-rim
Cha Seung-won
as Brian
Kim Sung-ryung
as Oh Yeon-ok
Park Hae-joon
as Park Seon-chang
Nam Moon-chul
as Department Head
Seo Hyun-woo
as Jeong-il
Kang Seung-hyun
as So-yeon
Jung Jun-won
as Deok-cheon
Jung Ga-ram
as Dong-woo
Jin Seo-yeon
as Bo-ryeong
Kim Dong-young
as Hearing-impaired Older Brother Dong-yeong
Lee Joo-young
as Hearing-impaired Younger Sister Joo-yeong
Geum Sae-rok
as Soo-jeong
Park Sung-yeon
as Sign Language Interpreter
Park Eun-young
as Yook Pil-soon
Na Ki-soo
as Lee Hak-seung