Dưa Hấu Lấp Lánh

Kim Joo Ryoung

Lim Ji Mi [Cheong A's stepmother]

Bong Jae Hyun

Ha Eun Ho [Eun Gyeol’s brother]

Choi Won Young

Ha I Chan [Older]

Seo Young Hee

Yun Cheong A [Older]

Koo Jun Hoe

Koo Jun Hyeong [Spine9's vocalist]

Cheon Ho Jin

Viva [Eun Gyeol's mentor]

Jung Sang Hoon

[Master]

Lee Suk Hyeong

Jung Bal San [College student]

Lee Su Chan

No Se Beom [Keyboardist]

Woo Je Yeon

On Ji Hwan

Han Min

Bae Su Tak [Spine9’s bassist]

Lee So Yeon

Choi Se Gyeong [Older]

Go Doo Shim

Ko Yang Hui [I Chan’s grandmother]

Lee Soo Min

Yun Sang A [Se Kyeong’s friend]

Yoon Jae Chan

Kang Hyeon Yul [Bassist]

Ahn Do Kyu

O Ma Ju [Band manager]

Kim Tae Woo

Yun Gun Hyeong [Cheong A's father]

Kwon Do Hyung

Yun Ju Yeop [Cheong A's stepbrother]

Yeon Oh

Jung Ji O [Spine9’s drummer]

Lee Ha Min

Lee Si Guk

Kim Ye Ji

Lee Mi Ra

Kim Hyung Beom

O Ma Ju [Older]

Shin Hyun Yong

[PE teacher]