Pemeran One Sunny Day

So Ji Sub (소지섭)

as Kim Ji Ho

Pemeran Utama

Kim Ji Won

as Kim Ji Ho

Pemeran Utama

Im Ju Eun

as [Ji Ho's ex-girlfriend]

Pemeran Pembantu

Lee Jong Hyuk

as Yeong Ho

Pemeran Pembantu

Ha Jae Sook

as [Hostel guest] / [Ji Ho's friend]

Pemeran Pembantu

Yoon Joo Man

as ["Doppelgangers"]

Pemeran Pembantu

Kim Mi Kyung

as Lee Cheon Won

Pemeran Pembantu

Kim Young Woong

as Hyun Chul

Pemeran Pembantu

Jung Mi Mi

Pemeran Pembantu

Baek Seung Hee

as [Couple girl]

Bintang Tamu

Lee Jong Hyun

as [Couple guy]

Bintang Tamu

Kim Je Dong

as [Speaker] (Ep.1)

Bintang Tamu

Park Se Jun

Composer

Kwon Hyuk Chan

Sutradara