CHARACTERS:

(male)

Liu Yiyun, Liu Jonghyun, Liu Donghae (triplet) (16 years old)

Sunny Lee Soonkyu, Onew Lee Jinki (twin) (17 years old)

Kim Taeyeon, Kim Hyoyeon (twin) (18 years old)

Kwon Yuri, Kwon Yoona, Kwon Yesung (triplet) (17 years old)

others: Kwon Taecyeon (18 years old), Key Lee Kibum (16 years old), Kim Minho Kim Taemin (twin) (16 years old), Kang Minhyuk (17 years old), Kris Hwang Yifan (16 years old), Leeteuk Park (18 years old)

(Female)

Jessice Jung Sooyeon, Krystal Jung Soojung, Nicole Jung Yonjoo (18 years old & 16 years old & 16 years old))

Stephanie Hwang Miyoung (17 years old)

Seo Joohyun (17 years old)

Choi Sooyoung (17 years old)

others: Liu Qian (18 years old), Luna Park (16 years old), Choi Sulli (16 years old), Kwon BoA (16 years old), Seo Minyoung (16 years old), Kang Jia (16 years old)

and others