Full cast of Friendly Rivalry

Lee Hye-ri

Yoo Je-yi

16 episodes

Chung Su-bin

Woo Seul-gi

16 episodes

Kang Hye-won

Joo Ye-ri

16 episodes

Oh Woo-ri

Choi Gyeong

16 episodes

Kim Tae-hun

Yoo Tae-joon

16 episodes

Chae Seo-eun

Jo Ah-ra

16 episodes

Choi Young-jae

Nam Byeong-jin

16 episodes

Kim Sang-ji

Beom-soo

16 episodes

Lee Won-jae

Woo Do-hyeok

16 episodes

Yoo Jung-Rae

Homeroom Teacher

16 episodes

Kang Jin-ah

Kwon Hee-yoon

16 episodes

Ma Hyun-ji

Park Byeong-hui

16 episodes

Choo Ye-jin

Yoo Je-na

16 episodes

Ha Mheen

Principal

16 episodes

Lee Na-ra

Joo Ye-ri Mother's

16 episodes

서은오

Kim Shan-young

16 episodes

Gi So-you

Young Yoo Je-na

2 episodes

Lee Eun-ju

Nun

1 episode

Son Young-soon

Flower Seller

1 episode

Park Seong-gyoon

Security Guard

1 episode

Oh Eun-seo

Young Yoo Je-i

1 episode

Lee Seol-ah

Teenage Yoo Je-na

1 episode

Yoon Chae-na

Young Ju Ye-ri

1 episode

Yoon Woo-ri

Woman Buying Drugs

1 episode

Moon Ki-young

Doctor

1 episode