Pemeran Sunny

Shim Eun Kyung

as Im Na Mi [Teen]

Pemeran Utama

Kang So Ra (강소라)

as Ha Chun Hwa [Teen]

Pemeran Utama

Kim Min Young

as Kim Jang Mi [Teen]

Pemeran Utama

Park Jin Joo (박진주)

as Hwang Jin Hui [Teen]

Pemeran Utama

Min Hyo Rin

as Su Ji [Teen]

Pemeran Utama

Nam Bo Ra

as Seo Geum Ok [Teen]

Pemeran Utama

Kim Bo Mi (김보미)

as Ryu Bok Hui [Teen]

Pemeran Utama

Yoo Ho Jung

as Im Na Mi

Pemeran Utama

Jin Hee Kyung

as Ha Chun Hwa

Pemeran Utama

Go Soo Hee

as Kim Jang Mi

Pemeran Utama

Hong Jin Hee

as Hwang Jin Hui

Pemeran Utama

Lee Yeon Kyung

as Seo Geum Ok

Pemeran Pembantu

Kim Sun Kyung

as Ryu Bok Hui

Pemeran Pembantu

Kim Shi Hoo

as Han Jun Ho [Teen]

Pemeran Pembantu

Lee Kyung Young

as Han Jun Ho

Pemeran Pembantu

Chun Woo Hee (천우희)

as Sang Mi

Pemeran Pembantu

Yoon Jung

as Su Ji

Pemeran Pembantu

Joo Jin Mo

as Seong Chan

Pemeran Pembantu

Park Hee Jung

as Young Jin

Pemeran Pembantu

So Hee Jung

as [Homeroom teacher]

Pemeran Pembantu

Kim Won Hae

as [Teacher]

Pemeran Pembantu

Lee Joon Hyuk

as [President of Private detective office]

Pemeran Pembantu

Ko Jun

as [Detective]

Pemeran Pembantu

Kwon Eun Soo

as [School broadcasting club DJ] (past)

Bintang Tamu

Kim Sae Byuk

as [President of class 3 grade 2 in the past]

Bintang Tamu

Han Bo Reum

as [Outcast of class 3 grade 2 in the past]

Bintang Tamu

Jeong Gye Hyeon

Assistant Editor

Lee Hyeong Deok

Cinematography

Kim Joon Seok

Composer

Chae Kyung Hwa

Costume Designer

Nam Na Yeong

Editor

Oh Seung Hyun

Producer

Ahn Byung Ki

Producer

Lee An Na

Producing Director

Lee Seung Yeop

Production Sound Mixer

Lee Byung Hun

Screenwriter

Kang Hyung Chul

Screenwriter & Sutradara

Geum Bo Ra

as [Past picture]

Cameo

Jung Won Gwan

as [Past picture]

Cameo

Kim Bo Yeon

as [Past picture]

Cameo

Kang Soo Yeon

as [Past picture]

Cameo

Go Doo Shim

as [Past picture]

Cameo

Jo Min Su

as [Past picture]

Cameo

Hwang Shin Hye

as [Past picture]

Cameo

Park Soon Chun

as [Past picture]

Cameo

Shim Hyung Rae

as [Past picture]

Cameo

Park Joong Hoon

as [Past picture]

Cameo

Ahn Sung Ki

as [Past picture]

Cameo

Chae Shi Ra

as [Past picture]

Cameo

Lee Bo Hee

as [Past picture]

Cameo

Lee Mi Sook

as [Past picture]

Cameo

Lee Deok Hwa

as [Past picture]

Cameo

Lee Sang Ah

as [Past picture]

Cameo

Choi Soo Im

as Il Jin [School girl]

Bit part

Jun Yoon Ji

as [Student presenter at festival]

Bit part

Lee Jong Hwan

as [Radio DJ from the past]

Bit part

Joo Myung Chul

as [Detective from the past]

Bit part

Bae Soo Kyung

as [Gang high school girl]

Bit part

Park Min I

as [Young Star employee]

Bit part

Jung Ye Jin

as [Student of class 3 grade 2 in the past]

Bit part

Ahn Soo Ho

as [Judge]

Bit part

Kim Min Jae

as [Young star in a music video]

Bit part

Lee Seung Hun

as [Driver]

Bit part

Jeong Gye Hyeon

Asisten Editor