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Art Director

• 
  Chae Kyung Sun

Cinematography

• 
  Kim Il Yeon

Composer

• 
  Mowg

Costume Designer

• 
  Chae Kyung Hwa

Executive Producer

• 
  Kang Hye Jung

Producer

• 
  Ryu Seung Wan

Production Sound Mixer

• 
  Kim Chang Seop

Screenwriter & Director

• 
  Lee Sang Geun

Visual Effects

• 
  Kim Sin Cheol
• 
  Yang Si Eun
• 
  Kim Han Joon
• 
  Kim Hyun Sung
• 
  Jung Do An
• 
  Kim Hye Yeon
• 
  Seo Deok Jae
• 
  Jeong Da Bin
• 
  Lee Hyeon Gyu
• 
  Lee Yeong Sang
• 
  Park Seong Jin
• 
  Park Myeong Seong
• 
  Park Hyeon Sun
• 
  Park Ji Seop
• 
  Son Hyeong Rok
• 
  Jeong Yun Hui
• 
  Son Hyeon Il
• 
  Cheon Rae Hun

Main Role

• 
  Jo Jung Suk

  Lee Yong Nam

  Main Role
• 
  Lim Yoon A

  Eui Joo

  Main Role

Support Role

• 
  Go Doo Shim

  Hyun Ok [Yong Nam's mother]

  Support Role
• 
  Park In Hwan

  Jang Soo [Yong Nam's father]

  Support Role
• 
  Kim Ji Young

  Jung Hyun [Yong Nam's sister]

  Support Role
• 
  Kang Ki Young

  Gu [Manager of Cloud Garden]

  Support Role
• 
  Bae Yoo Ram

  Yong Min

  Support Role
• 
  Yoo Soo Bin

  Yong Soo

  Support Role
• 
  Kim Kang Hoon

  Han Ji Ho [Yong Nam's nephew]

  Support Role
• 
  Jung Min Sung

  [First brother-in-law]

  Support Role
• 
  Park Jae Rang

  Jae Min

  Support Role
• 
  Yun Hae Bin

  Min Ji

  Support Role
• 
  Shin Se Hwi

  Yong Hye

  Support Role
• 
  Lee Bong Ryun

  [Third older sister]

  Support Role
• 
  Kim Jong Goo

  [Second uncle]

  Support Role
• 
  Park Sung Il

  [Third brother-in-law]

  Support Role

Guest Role

• 
  Song Won Su

  [Electric shop drone citizen]

  Guest Role
• 
  Park Chae Ik

  Il Ho

  Guest Role
• 
  Lee Hwa Jung

  Reporter Kim

  Guest Role
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  Ban Hye Ra

  [Second aunt]

  Guest Role
• 
  Tak Teu In

  [Drone brother]

  Guest Role
• 
  Shin Chul Jin

  [Elderly relative]

  Guest Role
• 
  Yoon Dae Yeol

  [Fire station chief]

  Guest Role
• 
  Park Jung Hwan

  [Response team leader]

  Guest Role

Bit part

• 
  Lee Dong Hwi

  [River cop]

  Bit part
• 
  Oh Hee Joon

  [Drone older brother]

  Bit part
• 
  Lee Jung In

  [Third aunt]

  Bit part
• 
  Kim Tae Yul

  [Ji Ho’s friend #1]

  Bit part
• 
  Lee Chan Yoo

  [Ji Ho's friend #2]

  Bit part
• 
  Bae Hae Seon

  Director Bae [CBA Press Director]

  Bit part
• 
  Great Library Bit part
• 
  Jung Woo Young

  [River cop]

  Bit part
• 
  Yum-cast Bit part
• 
  Kang Chung Hun

  [SNB anchor]

  Bit part
• 
  Kim Kang Hyun

  [Rock climbing instructor]

  Bit part
• 
  Lee Yong Tak

  [Cloud garden photographer]

  Bit part
• 
  Choi Young Do

  Captain Heo

  Bit part
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  Kim Sang Bo

  [Patients guardian]

  Bit part
• 
  Cho Sung Hee

  [Taxi guest]

  Bit part
• 
  Kwak Min Gyoo

  [CBA broadcasting station employee]

  Bit part
• 
  Lee Rang Seo

  [Part time employee at Cloud Garden]

  Bit part
• 
  Kim Hwan Young

  [Worker 2 at Cloud Garden]

  Bit part
• 
  Kang Deok Jung

  [Team Leader, Detection and Collection]

  Bit part
• 
  Kim Byung Soon

  [3rd Uncle]

  Bit part
• 
  Joo Bo Bi

  [First birthday mother]

  Bit part
• 
  Hong Na Hyun

  [Selfie teenager]

  Bit part
• 
  Byun Gun Woo

  [Cloud Garden passerby]

  Bit part
• 
  Jung Ji Woo

  [Main character in drama]

  Bit part
• 
  Kim Te I

  [Kid running due to gas leak]

  Bit part
• 
  Lee Seon U

  [Security guard]

  Bit part