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Season Regulars 19
Park Ji-hoon
Yeo Joon
Bae In-hyuk
Nam Soo-hyun
Kang Min-ah
Kim So-bin
Kwon Eun-bin
Wang Young-ran
Woo Da-vi
Gong Mi-joo
Choi Jung-woo
Hong Chan-ki
Lee Woo-je
Han Jung-ho
Yoo In-soo
Oh Cheon-kook
Yoon Jung-hoon
Go Sang-tae
Shin Su-hyun
Park Hye-ji
Choi Moon-hee
Lee Gi-seon
Bin Chan-uk
Kim Jung-beom
Cha Chung-hwa
Professor Song Soo-kyung
Eru
Professor Park
Kim Hyeong-mook
Yeo Myung-hoon
So Hee-jung
Cha Jeong-joo
Na In-woo
Yeo Joon-wan
Kim Su-gyeom
Nam Goo-hyun
Lee Ye-rim
Miss Seol Na-young [Assistant teacher]