Pemeran A-Teen

Shin Ye Eun (신예은)

as Do Ha Na

Pemeran Utama

Lee Na Eun (이나은)

as Kim Ha Na

Pemeran Utama

Kim Soo Hyun

as Yeo Bo Ram

Pemeran Utama

Kim Dong Hee (김동희)

as Ha Min

Pemeran Utama

Shin Seung Ho (신승호)

as Nam Shi Woo

Pemeran Utama

Ryu Eui Hyun

as Cha Gi Hyun

Pemeran Utama

Ahn Jung Hun

as Nam Ji Woo [Si Woo's brother]

Pemeran Pembantu

Ra Lee Hye Jin

as [Div 3 homeroom teacher]

Pemeran Pembantu

Cho So Bin

as Kim Na Hee [Ha Min's Tutor]

Pemeran Pembantu

Jung Gun Joo (정건주)

as Mr. Choi [P.E. Teacher] (Ep. 6)

Bintang Tamu

Yeon Je Hyung

as Yeon Je Hyung (Ep.13)

Bintang Tamu

Jo Hye Joo

as [Ha Na's cousin] (Ep. 16)

Bintang Tamu

Kim Si Eun

as Park Ye Ji [Attendee of private academy with Do Hana and Kim Joyeon] (Ep. 18)

Bintang Tamu

Lee Je No

as [Student] (Ep.20)

Bintang Tamu

Na Jae Min

as [Student] (Ep.20)

Bintang Tamu

Baek Soo Hee

as Lee Jung Min (Ep.23)

Bintang Tamu

Choi Won Myung

as Choi Won Myung

Bintang Tamu

Motte

as [Busker] (Ep. 24)

Bintang Tamu

Han Soo Ji

Sutradara

Kim Sa Ra

Screenwriter