Cheer Up

Director

• 
  Han Tae Seob

Screenwriter

• 
  Cha Hye Won

Main Role

• 
  Han Ji Hyeon

  Do Hae Yi

  Main Role
• 
  Bae In Hyuk

  Park Jung Woo

  Main Role
• 
  Kim Hyun Jin

  Jin Sun Ho

  Main Role
• 
  Jang Gyu Ri

  Tae Cho Hee

  Main Role

Support Role

• 
  Lee Min Jae

  Do Jae Yi

  Support Role
• 
  Lee Eun Saem

  Joo Sun Ja

  Support Role
• 
  Yang Dong Geun

  Bae Young Woong

  Support Role
• 
  Kim Shin Bi

  Im Yong Il

  Support Role
• 
  Ryu Hyun Kyung

  Shin Ji Young

  Support Role
• 
  Nam Joong Gyu

  Jung Soo Il

  Support Role
• 
  Eun Hae Sung

  Lee Jae Hyuk

  Support Role
• 
  Lee Jung Joon

  Ki Woon Chan

  Support Role
• 
  Baek Ji Won

  Hwang Jin Hee

  Support Role
• 
  Jang Young Nam

  Sung Choon Yang

  Support Role
• 
  Han Soo A

  Choi So Yoon | Choi Ji Yoon

  Support Role
• 
  Hyun Woo Seok

  Kim Min Jae

  Support Role
• 
  Yoon Bok In

  Jung Sun Hye

  Support Role
• 
  Jung Shin Hye

  Lee Ha Jin

  Support Role
• 
  Song Deok Ho

  Song Ho Min

  Support Role
• 
  Park Bo Yeon

  Lee Yoo Min

  Support Role
• 
  Kwon Hyuk

  Jin Min Chul

  Support Role
• 
  You Yi Joon

  [Director]

  Support Role
• 
  Lee Seung Min Support Role
• 
  Seo Young Sam

  Kim Jung Hoon

  Support Role
• 
  Cheon Dong Bin

  [Yonhee University color guard leader]

  Support Role
• 
  Lee Sang Jun

  [Yonhee University color guard member]

  Support Role
• 
  Park Eun Woo

  Mi Jung

  Support Role
• 
  Jeon Young

  [Jin Sun Ho's family maid]

  Support Role
• 
  Jang Yo Hoon

  Joon Hyuk

  Support Role
• 
  Park Xi Yeon

  [Broadcasting club member]

  Support Role
• 
  Im Ji Ho

  Kim Jin Il

  Support Role

Guest Role

• 
  Jo Sung Joon

  [Orientation event MC] (Ep. 1)

  Guest Role
• 
  Han Hye Ji

  [Investment club member] (Ep. 1)

  Guest Role
• 
  Yoon Byung Hee

  [Prophet] (Ep. 1, 16)

  Guest Role
• 
  Kim Ha Eun

  Do Hae Yi [Young] (Ep. 2)

  Guest Role
• 
  Moon Woo Bin

  [Library worker] (Ep. 2)

  Guest Role
• 
  Jang Moon Jung

  [Library worker] (Ep. 2)

  Guest Role
• 
  Yoon Jun Won

  [Jung Woo's friend] (Ep. 2)

  Guest Role
• 
  Park Min Ha

  Do Hae Yi [Teen] (Ep. 4)

  Guest Role
• 
  Kwon Oh Geon

  Do Jae Yi [Young] (Ep. 4)

  Guest Role
• 
  Park Beom Chan

  [Delivery man] (Ep. 4)

  Guest Role
• 
  Ko Jae Hyun

  [Unknown] (Ep. 4)

  Guest Role
• 
  Han Sang Chul

  [Drunk customer] (Ep. 4)

  Guest Role
• 
  Seol Chang Hee

  [Technician] (Ep. 5)

  Guest Role
• 
  Myung Jae Hwan

  [Yonhee University faculty] (Ep. 5)

  Guest Role
• 
  Hong Seong Gwan

  [Rugby team captain] (Ep. 5-6)

  Guest Role
• 
  Park In Chun

  [Professor] (Ep. 5, 11)

  Guest Role
• 
  Lee Ha Nee

  Park Yoon Ho (Ep. 5, 15)

  Guest Role
• 
  Cha Jung Won

  [Medical student] (Ep. 6)

  Guest Role
• 
  Lee Sung Il

  [Butler Choi manager] (Ep. 6)

  Guest Role
• 
  Han Ye Ji

  [Jin Sun Ho's girlfriend] (Ep. 6)

  Guest Role
• 
  Jang Na Ra

  Na Jung Sun (Ep. 7)

  Guest Role
• 
  Byun Yoon Jeong

  [Lee Sung Chul's mother] (Ep. 7)

  Guest Role
• 
  Jukjae

  [Himself] (Ep. 9)

  Guest Role
• 
  Park Jong Bo

  [Security guard] (Ep. 9)

  Guest Role
• 
  Kim Soo Jin

  Lee Soon Ja (Ep. 10)

  Guest Role
• 
  Kim Do Hyun

  [Joo Sun Ja's father] (Ep. 10)

  Guest Role
• 
  Jung Seo In

  [Busan market vendor] (Ep. 10)

  Guest Role
• 
  Jung Hye Kyung

  [Busan market vendor] (Ep. 10)

  Guest Role
• 
  Kim Deok Ju

  [Busan market shopper] (Ep. 10)

  Guest Role
• 
  Eom Ok Ran

  [Busan market shopper] (Ep. 10)

  Guest Role
• 
  Jung Hee Young

  [Busan market vendor] (Ep. 10)

  Guest Role
• 
  Im Ho Joon

  [Kim Jin Il's uncle] (Ep. 13)

  Guest Role
• 
  Kim Dong Yong

  [Doctor] (Ep. 14)

  Guest Role
• 
  Wie Shin Ae

  [Documentary writer] (Ep. 14)

  Guest Role
• 
  Kang Jung Goo

  [Documentary director] (Ep. 14)

  Guest Role
• 
  Kim Joo Ah

  [Soo Il's mom] (Ep. 15)

  Guest Role
• 
  Choi Gyo Shik

  [Hae I's uncle] (Ep. 16)

  Guest Role
• 
  Na Ho Won

  [Job interviewer] (Ep. 16)

  Guest Role
• 
  Lee Jong Hyuk

  Sung Kyu Jin

  Guest Role
• 
  Park Jun Seo

  [Cheerleader]

  Guest Role
• 
  Seo Tae Woong

  [Band vocalist]

  Guest Role
• 
  Lee Seung Kyu

  [Student athlete]

  Guest Role
• 
  Yeon Si

  [Camcorder crew member]

  Guest Role
• 
  Han Jong Kyu

  [Hokyung university student]

  Guest Role
• 
  Choi Sung Yool

  [Cheering Squad Theia staff]

  Guest Role
• 
  Jeon Gang Ho

  [Rugby player]

  Guest Role

Unknown

• 
  Yoo Jin Seok Unknown
• 
  Jung Ji Woo Unknown
• 
  Hwang Jae Wook Unknown