Pemeran Because It's the First Time

Choi Min Ho (최민호)

as Yun Tae O

Pemeran Utama

Park So Dam (박소담)

as Han Song I

Pemeran Utama

Kim Min Jae (김민재)

as Seo Ji An

Pemeran Utama

Lee Yi Kyung (이이경)

as Choi Hoon

Pemeran Utama

Jung Eugene

as Ryoo Se Hyun

Pemeran Utama

Cho Hye Jung

as Oh Ga Rin

Pemeran Utama

Jung Man Sik

as [Ji An's father]

Pemeran Pembantu

Ahn Nae Sang

as [Tae O's father]

Pemeran Pembantu

Lee Seung Yeon

as [Song I's aunt] (Ep. 1)

Bintang Tamu

Lim Yoon A (임윤아)

as [High School senior] (Ep. 1)

Bintang Tamu

Hong Seok Cheon

as [Coffee shop manager] (Ep. 1)

Bintang Tamu

Yang Hee Kyung

as [Counselor] (Ep. 1)

Bintang Tamu

Yoon Hyun Min

as [Police officer] (Ep .2)

Bintang Tamu

Jung Kyung Ho (정경호)

as [Police officer] (Ep. 2)

Bintang Tamu

Seol Chang Hee

as [Hun's older brother] (Ep. 2)

Bintang Tamu

Jang Hae Song

as [Hun's older brother] (Ep. 2)

Bintang Tamu

Heo Seon Haeng

as [Song I's mother's boyfriend] (Ep. 7)

Bintang Tamu

Nam Hye Seung

Composer

Lee Jeong Hyo

Sutradara

Jung Hyun Jung

Screenwriter