 | Seung-beom Ryu | ... | Jung-pil |
| Hyo-jin Kong | ... | Na-young |
| Eun-kyeong Lim | ... | Min-hee |
| Ji-hye Shin | ... | Seon-ju |
| rest of cast listed alphabetically: |
| Kil-Kang Ahn | ... | Taekwondo Master |
| Chris Ayres | ... | Student Warning, Student Bow B, Judo Dude C, Student Chief B (voice: English version) (as Christopher Ayres) |
| Greg Ayres | ... | Student Aqua Shirt, Skate Wimp A, Student Gamer A, Student Window Fight (voice: English version) |
| Rebecca Ayres | ... | Small Kid, Kid B (voice: English version) |
| Clint Bickham | ... | Student Black Glasses, Student Gamer B, Student Black Shirt (voice: English version) |
| Tae-gyu Bong | ... | Soo-dong |
| David Born | ... | Porn Dealer (voice: English version) |
| April Brem | ... | Lady Pig Tales, Gangsta Bitch Brawlers B (voice: English version) |
| Kevin Brown | ... | Young-mahn (voice: English version) |
| Shelley Calene-Black | ... | Joong-pil's Mother (voice: English version) |
| Lee Chang-Hwan | ... | Iron Mask |
| Woo-hyeok Choi | ... | Young-mahn |
| Luci Christian | ... | Band Nerdette, Min-hee Friend A, Lady Aqua Shirt, Dancer Unlucky, Gangsta Bitch Brawlers C (voice: English version) |
| Lee Chul-ho | ... | Guitar School Owner |
| Yeom Chul-ho | ... | Inha High's Big Foot |
| Kaytha Coker | ... | Na-young (voice: English version) |
| Adam Conlon | ... | Student Client A, Student Pink Comb, Student Gangbang (voice: English version) |
| Kevin Corn | ... | Big Kid x2 (voice: English version) |
| Matthew Crawford | ... | Additional Voices (voice: English version) (as Matt Crawford) |
| Lee Dong-ha | ... | Book Seller |
| Lee Dong-Hyup | ... | Dogmeat |
| Jason Douglas | ... | Daemyung Master / Student Complexion (voice: English version) |
| Tommy Drake | ... | Soo-dong (voice: English version) |
| Cynthia Ann Feaster | ... | Gangsta Bitch Skinny (voice: English version) (as Cynthia Feaster) |
| Alice Fluker | ... | Club Street Chick, Salon Customer (voice: English version) |
| Bo-ra Geum | ... | Joong-pil's Mom |
| Patrick Givens | ... | Music Teacher, Youong-mahn's Dad, Additional Voices (voice: English version) |
| Joey Goubeaud | ... | Additional Voices (voice: English version) |
| Jacob A. Gragard | ... | Student Chief A, Mr. Red Shirt, Student Gamble A, Student Yessir, Additional Voices (voice: English version) |
| Illich Guardiola | ... | Rumor Mill #2 (voice: English version) |
| Quentin Haag | ... | Daemyung Bully, Big Brother Intercom, Judo Dude B, Valedictorian, P.E. Boy A (voice: English version) |
| Richard Hasenmyer | ... | Student Richard (voice: English version) |
| Steven Hasenmyer | ... | Student Gray Shirt (voice: English version) |
| Kim Hee-Jung | ... | Nurse Teacher |
| Adrian Heredia | ... | Judo Dude D, Skate Wimp B, Student Gamble B (voice: English version) |
| Jay Hickman | ... | Rumour Mill #4 (voice: English version) |
| Braden Hunt | ... | Student Thin Rims (voice: English version) |
| Ahn Hyung-Joon | ... | Dangoon Gang |
| Jeon Hyun-Sook | ... | Princess Gang |
| Yang Ik-Joon | ... | Sesaem 2 |
| Park Il-hwa | ... | Wild Rose Gang |
| Kim Jae-Hong | ... | Video Tape Seller |
| Park Ji-Hyun | ... | Wild Rose Gang |
| K.C. Jones | ... | Hazing Victim, Bouncer, P.E. Boy B, Student Shoe Shiffer, Student Panzy B, Additional Voices (voice: English version) |
| Kim Jong-un | ... | Sesaem 1 |
| Kim Joon-Hong | ... | Pimple |
| Jung Joo-ran | ... | Princess Gang |
| Lee Joo-Seng | ... | Supermarket Owner |
| Ha Jung-hwa | ... | Wild Rose Gang |
| Yoo Jung-min | ... | Princess Gang |
| Afshar Kharat | ... | Student Info, Additional Voices (voice: English version) |
| Hie-jeong Kim | | |
| Jeong-gook Kim | ... | Dangoon Gang |
| Ji-hye Kim | ... | Wild Rose Gang |
| Kwang-il Kim | ... | Sang-mahn |
| Mark Laskowski | ... | Pimples, Student Bump Info, P.E. Boy Balls, Student Panzy A (voice: English version) (as Mark X. Laskowski) |
| Min-ho Lee | ... | Sesaem 3 |
| Paul Locklear | ... | Rumour Mill #3 (voice: English version) |
| George Manley | ... | Iron Mask (voice: English version) |
| Andy McAvin | ... | Dog Meat (voice: English version) |
| Jim McClellan | ... | P.E. Teacher, Judo Dude A (voice: English version) |
| Andrew Menzel | ... | Student Client B, Roller Dweeb, Student Plaid Shirt, Student Bowl Cut (voice: English version) |
| Jason Miesse | ... | Dan Goon C (voice: English version) |
| Vic Mignogna | ... | Dan Goon Leader, Student Bow A, Adult Passerby (voice: English version) |
| Kil Min-joo | ... | Wild Rose Gang |
| Lee Min-joo | ... | Wild Rose Gang |
| Im Mi-Yeon | ... | Wild Rose Gang |
| Mateo Mpinduzi-Mott | ... | Kid A (voice: English version) |
| Amanda Nanawa | ... | Min-hee Look-alike, Gangsta Bitch Brawlers A (voice: English version) |
| Chris Nelson | ... | Guitar Store Owner (voice: English version) |
| Nancy Novotny | ... | Gangsta Bitch Chin (voice: English version) |
| Paul Oddo | ... | Seung-mahn (voice: English version) |
| Eric Opella | ... | Dan Goon B (voice: English version) |
| Mariela Ortiz | ... | Gangsta Bitch Alarm, Min-hee Friend B (voice: English version) |
| Neil O'Sullivan | ... | Cotton Candy Man, Teacher (voice: English version) |
| Hyo-ju Park | | |
| Seong-bin Park | ... | Taekwondo Chief |
| Chris Patton | ... | Rumor Mill #1 (voice: English version) |
| Lidia Porto | ... | Flower Lady, Salon Giggler A (voice: English version) |
| Chris Pruell | ... | Market Owner, Concert Intercom (voice: English version) |
| Monica Rial | ... | Gangsta Bitch Horny (voice: English version) |
| Santry Rush | ... | Dan Goon D (voice: English version) |
| Seung-su Ryu | | |
| Yeon Sang-Yoon | ... | Freckles |
| Myung-Seok Seo | ... | Dangoon Gang |
| Ryu Seong-soo | ... | Judo Chief |
| Yoon Seung-Hoon | ... | Dangoon Gang |
| Wade Shemwell | ... | Additional Voices (voice: English version) |
| Stacy Slanina | ... | Min-hee Look-alike Friend, Dancer Disser, Gangsta Bitch Brawlers E, Additional Voices (voice: English version) |
| Jeon So-hee | ... | Snack Corner Girl |
| Jenny Strader | ... | Sun-joo, Lady Dodge Ball, Lady Pink Belt, Salon Giggler B, Gangsta Bitch Brawlers D (voice: English version) (as Jenni Strader) |
| Yoon Sun-ah | ... | Min-hee's Friend |
| John Swasey | ... | Joong-pil (voice: English version) |
| Lee Tae-il | ... | Boy 1 |
| Serena Varghese | ... | Gangsta Bitch Mullet (voice: English version) |
| Anita Vasquez | ... | Gangsta Bitch Bandana (voice: English version) |
| Kira Vincent-Davis | ... | Min-hee (voice: English version) |
| Todd Waite | ... | DJ Jazzy Awesome (voice: English version) |
| Carl Wormley | ... | Student Tall, Additional Voices (voice: English version) |
| Cho Young-im | ... | Princess Gang |
