Kang Shi-hyun
Na Aeri / Go Eunae (voice)
Acting
Jung Hye-won
Hany (voice)
Acting
Hong Bum-ki
Mr. Hong / Student 1 / Student 5 / Bench Man (voice)
Acting
Lee Sae-byeok
Rapid Ju (voice)
Acting
Lee Sang-ho
Lee Changsu / Play-by-play Commentator / Doctor (voice)
Acting
Kim Hyeon-uk
Yoo Juntae / Principal / Long-legged Athlete / Student 2 (voice)
Acting
Kwak Gyu-mi
Mina / Lee Seoyeon / Bully Girl 2 / Bully Girl 4 / Student 3 (voice)
Acting
Choi Nak-yoon
Na Aeri's Father / Color Commentator (voice)
Acting
Kim Ye-jin
Bully Girl 1 / Bully Girl 3 (voice)
Acting