Male celebs play make-believe as high schoolers, welcoming star transfer students every week and engaging in battles of witty humor and slapstick.
Music Video Special - Part 1. Song Eun-yi, Yoo Se-yoon, Hong Jin-young
Music Video Special - Part 2. Song Eun-yi, Yoo Se-yoon, Hong Jin-young
Don Spike, Sam Hammington, Tae Hang-ho, Park Mi-sun, Yoon Jung-soo, Hong Hyun-hee, Hong Yoon-hwa
Lee Hee-jin, Hyomin (T-ara), Seunghee (Oh My Girl), Sejeong (Gugudan)
Kim Hye-yoon, SF9 (Rowoon, Chani), Bona (Cosmic Girls), Kim Kang-hoon
Kim Jun-hyun, Hong Hyun-hee, Ravi (VIXX), Seungkwan (Seventeen)
Song Eun-i, Lee Ji-hye, Narsha (Brown Eyed Girls), YOYOMI, Loona (Yves, Chuu, Heejin)
Lee Joon, Jung Yong-hwa (CNBLUE), Lee Jin-hyuk (UP10TION), Jeong Se-woon
Lee Seung-yoon, Jung Hong-il, Lee Mu-jin, Sojung (Ladies' Code)
Yang Ji-eun, Hong Ji-yun, Kim Da-hyun, Kim Tae-yeon, Kim Eui-young, Byeol Sa-rang, Eun Ga-eun
Shinhwa (Jun Jin, Andy), Baby V.O.X (Kan Mi-youn, Yoon Eun-hye)
Jeong Jin Woon, Lim Seul Ong, Jo Kwon and Lee Chang Min (2AM)
2PM (Jun. K, Wooyoung), Monsta X (Minhyuk, Joohoney), Astro (Moon Bin, Yoon San-ha), THE BOYZ (Juyeon, Q), Park Goon, Na Tae-joo (1)
2PM (Jun. K, Wooyoung), Monsta X (Minhyuk, Joohoney), Astro (Moon Bin, Yoon San-ha), THE BOYZ (Juyeon, Q), Park Goon, Na Tae-joo (2)
Im Jae-hyuk, Ha Seung-ri, Yoo In-soo, Lee Eun-saem, Yoon Chan-young, Park Ji-hu
Kim Ki-tae, Kim So-yeon, Yun Seong, Park Hyun-kyu, Shin You-me
Seventeen (Jeonghan, Joshua, Jun, Hoshi, Mingyu, DK, The8, Seungkwan)
Kim Jong-min (Koyote), Heo Kyung-hwan, Park Young-jin, Sleepy, Ryeowook (Super Junior), Infinite (Kim Sung-kyu, Lee Sung-jong), Seo Eun-kwang (BtoB) (1)
Kim Jong-min (Koyote), Heo Kyung-hwan, Park Young-jin, Sleepy, Ryeowook (Super Junior), Infinite (Kim Sung-kyu, Lee Sung-jong), Seo Eun-kwang (BtoB) (2)
Lim Nayoung (former I.O.I), Park Sunghoon, Kim Soeun, Song Jinwoo
Kim Jimin, Park Misun, Jo Hyeryun, Hong Jiyoon, OH MY GIRL Mimi & YooA, VIVIZ SinB & Eunha
Kang Soo-jung, Son Jun-ho, Jo Jung-sik, Lee Na-yeon, Kim Jong-jin, Jeong Keun-woo, Han Suk-joon, Lee Seung-hyun
Hwang Soo-kyung, g.o.d Joon Park, ZEROBASEONE Zhang Hao & Matthew Seok, n.SSign Eddie, Sugar Lee Ayumi, SECRET NUMBER Dita, BLACKSWAN Fatou, Billlie Tsuki & KISS OF LIFE Natty
Abhishek Gupta/Lucky, Christina Confalonieri, Alberto Mondi, Julian Quintart, Kris Johnson
Kim Mi-ryeo, Lee Eun-hyung, Hur An-na, Hong Yun-hwa, Lim Lala
T1 (Choi Woo-je (Zeus), Moon Hyeon-joon (Oner), Lee Sang-hyeok (Faker), Lee Min-hyung (Gumayusi), Ryu Min-seok (Keria)
Issac Hong, So Soo-bin, EJel, Shin Hae-sol, Leejean, Kang Seong-hee, Chu Seung-yeob
Tony Akins (Chon Tae-poong), Julien Kang, Andre Jin Coquillard
Roh Jeong-eui, Lee Chae-min, Kim Jae-won, Ji Hye-won, Lee Won-jung
Park Sung-woong, Moon Jeong-hee, Choi Won-young, Park Hyo-joo
Park Jae-han (Pani Bottle), Lee Won-ji (1G), Park Jae-il (Channel Korean Jay)
Choi Moo-sung, Choi Won-young, Hwang In-youp, Jung Chae-yeon, Bae Hyun-sung
Sam Hammington, Brian Joo (Fly to the Sky), Kiss of Life (Julie, Natty)
Lee Jang-won (Peppertones), Kim Min-woo (Mimiminu), Heo Seong-beom, Kim Yoo-yeon (TripleS)
Park Nam-jung, Shim Shin, Bibi, Sieun (STAYC), Belle (Kiss of Life), Kim Na-kyoung (TripleS)
Park Seong-on, Kim Tae-yeon, Hwang Min-ho, Lee Cheon-mu, Lee Su-yeon, Oh Ji-yul, Ryu Ji-woo
Kim Yong-bin, Son Bin-ah, Cheon Lok-dam, Chun Gil, Choi Jae-myung, Chu Hyuk-jin
