El juego de la pirámide

보나

Seong Su-ji

장다아

Baek Ha-rin

류다인

Myung Ja-eun

Kang Na-eon

Im Ye-rim

정하담

Ko Eun-byeol

하율리

Bang Woo-yi

황현정

Kim Da-yeon

신슬기

Seo Do-ah

이주연

Shim Eun-jeong

오세은

Song Jae-hyung

송시안

Oh Sung-a

손지영

Ra Hae-jun

Kim Se-hee

Pyo Ji-ae

Choi Yoon-seo

Koo Seol-ha

Lee Da-kyung

Yoon Ye-won

Kwon Yi-soo

Joo Seung-yi

Kim Ye-na

Jung Yeon-doo

Lee Gyu-seon

Park Ji-young

Kim Ji-an

Cho Yu-rim

Kwon Tae-hee

Shin Shin-ye

Yoon Na-eun

Choi Yu-hyun

Do Ji-woo

Cha Seon-ju

Jo Woo-mi

Do Mi-young

Baek Seo-ha

Lee Bo-hyun

Jeong Ji-soo

Yang So-young

주보영

Cho Woo-ri

손지나

Principal Im Soon-ae

안소요

Yoon Na-hee

전사라

Teacher Choi

김비비

Teacher Hong

조유진

Teacher Ahn

이시영

Teacher Park

Baek Cho-a

School Nurse

최성원

Teacher Im Ju-hyung

전준우

Teacher Jeon

조동인

Jo Seung-hwa

최대철

Sung Hee-suk

남기애

Byun Cho-soon

김영필

Baek Hyun-joon

Jung Ae-yeon

Choi Yi-hwa

서경화

Kang Sun-hee

이채빈

Myung Ja-eun (child)

김소운

Ko Eun-byeol's Mom

정승길

Seo Joong-yeon

Jeong Gi-seop

Kim Byung-oh

송아경

Kim Da-yeon's Mom