Pemeran Start-Up

Bae Suzy (배수지)

as Seo Dal Mi

Pemeran Utama

Nam Joo Hyuk (남주혁)

as Nam Do San

Pemeran Utama

Kim Seon Ho (김선호)

as Han Ji Pyeong

Pemeran Utama

Kang Han Na (강한나)

as Won In Jae

Pemeran Utama

Kim Hae Sook

as Choi Won Deok

Pemeran Pembantu

Kim Do Wan (김도완)

as Kim Yong San [Software engineer]

Pemeran Pembantu

Yoo Soo Bin

as Lee Cheol San [Software engineer]

Pemeran Pembantu

Stephanie Lee

as Jung Sa Ha [Sandbox]

Pemeran Pembantu

Seo Yi Sook

as Yun Seon Hak [SH Venture Capital director]

Pemeran Pembantu

Kim Min Seok

as Park Dong Cheon [SH Venture Capital employee]

Pemeran Pembantu

Jasper Cho

as Alex Kwon [2STO]

Pemeran Pembantu

Kang You Seok (강유석)

as Sin Hyeon [Developer]

Pemeran Pembantu

Joo Bo Young

as Sin Jeong [Developer]

Pemeran Pembantu

Kim Hee Jung

as Park Geum Jung [Do San's mother]

Pemeran Pembantu

Kim Won Hae

as Nam Seong Hwan [Do San's father]

Pemeran Pembantu

Jang Se Hyun

as Nam Cheon Ho [Do San's cousin]

Pemeran Pembantu

Song Sun Mi

as Cha Ah Hyeon [Dal Mi and In Jae's mother]

Pemeran Pembantu

Um Hyo Sup

as Won Du Jeong [In Jae's stepfather]

Pemeran Pembantu

Moon Dong Hyeok

as Won Sang Su [In Jae's stepbrother]

Pemeran Pembantu

Song Ho Soo

as Lee Dae Myeong [In Jae's employee]

Pemeran Pembantu

Lee Min Ryung

as I Su [In Jae's employee]

Pemeran Pembantu

Ahn Soo Bin

as Lee Min Ji (Ep. 1)

Bintang Tamu

Ji Sung Geun

as [Bus passenger] (Ep. 1)

Bintang Tamu

Park Young Soo

as [Real estate agent] (Ep. 1)

Bintang Tamu

Yoo Mi Ran

as [Real estate agent] (Ep. 1)

Bintang Tamu

Kim Jong Ho

as [SH Venture Capital employee] (Ep. 1)

Bintang Tamu

Park Choong Seon

as [Il Cheung Constructon & Trading manager] (Ep. 1)

Bintang Tamu

Nam Da Reum (남다름)

as Han Ji Pyeong [Young] (Ep. 1-2)

Bintang Tamu

Lee Re

as Won In Jae [Young] (Ep. 1, 16)

Bintang Tamu

Heo Jung Eun

as Seo Dal Mi [Young] (Ep. 1, 3-4, 16)

Bintang Tamu

Kim Kang Hoon

as Nam Do San [Young] (Ep. 1, 5, 9, 12)

Bintang Tamu

Choi Yun Seol

as [Hotel waitress] (Ep. 2)

Bintang Tamu

Bae Bo Ram

as [Lucca The Tea barista] (Ep. 2)

Bintang Tamu

Jung Ji Hyun

as [Lucca The Tea barista] (Ep. 2)

Bintang Tamu

Kim Ji In

as Seo Hyeon [Lucca The Tea employee] (Ep. 2-3)

Bintang Tamu

Yoon Seo Hyun

as [Lucca The Tea HR manager] (Ep. 2-3)

Bintang Tamu

Kwon Ki Joo

as [Deliveryman] (Ep. 3)

Bintang Tamu

Go Han Min

as Ko Eun Hyeon (Ep. 4)

Bintang Tamu

Kwon Ban Suk

as [Investor] (Ep. 4)

Bintang Tamu

Oh Ji Yeon

as [Investor] (Ep. 4)

Bintang Tamu

Joo Seung Min

as [Investor] (Ep. 4)

Bintang Tamu

Bae Yoo Ri

as [Hackathon CEO] (Ep. 5)

Bintang Tamu

Kim Chae Hyun

as [Hackathon CEO] (Ep. 5)

Bintang Tamu

Jang Young Hyun

as [Hackathon CEO] (Ep. 5)

Bintang Tamu

Kim Sung Yong

as [College math teacher] (Ep. 5)

Bintang Tamu

Park Seung Chan

as [Doctor] (Ep. 6)

Bintang Tamu

Moon Se Yoon

as [Security guard] (Ep. 7)

Bintang Tamu

Bae Hae Seon

as Lee Hye Won [Seonju CEO] (Ep. 8)

Bintang Tamu

Gu Bon Jin

as [Detective] (Ep. 8)

Bintang Tamu

Im Sung Mi

as [Blind woman] (Ep. 8)

Bintang Tamu

Park Chan Ho

as Park Chan Ho (Ep. 8, 12)

Bintang Tamu

Lee Dong Hee

as O Yeon Ho (Ep. 9-10)

Bintang Tamu

Yang Dae Hyuk

as Choi Yang Won [Reporter] (Ep. 9-10)

Bintang Tamu

An Young Mi

as [Waitress] (Ep. 10)

Bintang Tamu

Lee Bo Young (이보영)

as [Woman at pub] (Ep. 10)

Bintang Tamu

O Gyu Taek

as [Park cleaning man] (Ep. 10)

Bintang Tamu

Lee Da Hae

as [Start-up CEO] (Ep. 10-11)

Bintang Tamu

Jung Jun Hwan

as [Hackathon participant] (Ep. 10-11)

Bintang Tamu

Jung Wook Jin

as Kim Dong Su (Ep. 11)

Bintang Tamu

Bret Allan Lindquist

as [2STO employee] (Ep. 11-12)

Bintang Tamu

Jun Joon Woo

as [2STO employee] (Ep. 11-12)

Bintang Tamu

Kim Ji Su

as [Flight attendant] (Ep. 12)

Bintang Tamu

Jang Hae Song

as [Insurance salesman] (Ep. 13)

Bintang Tamu

Shin Dong Hoon

as [Investor] (Ep. 14)

Bintang Tamu

Jeon Yeo Jin

as [Investor] (Ep. 14)

Bintang Tamu

Lim Seung Beom

as [Investor] (Ep. 14)

Bintang Tamu

Kim Sung Yeol

as [Photographer] (Ep. 14)

Bintang Tamu

Park Sang Hyun

as [Magazine staff] (Ep. 14)

Bintang Tamu

Yeo Jin Goo (여진구)

as Jang Yeong Sil [Voice] | Hong Ji Seok [CEO of Chan Seong Ltd.] (Ep. 16)

Bintang Tamu

Hong Seong Gwan

as [Startup guy] (Ep. 16)

Bintang Tamu

Ahn Ji Hwan

as Han Gang Jin

Bintang Tamu

Kim In Sun

as [Cafe part-timer]

Bintang Tamu

Jang Woo Jun

as [Playground boy]

Bintang Tamu

Hong Eun Jeong

as [Woman on the rain]

Bintang Tamu

Jung Joon

as [Autograph student]

Bintang Tamu

Jeong Si Hun

as [Handsome man in neighborhood]

Bintang Tamu

Kim Hyun Mok

as [New tenant in the old Sam San Tech office]

Bintang Tamu

Kim Seong In

Bintang Tamu

Lee Chang Won

Bintang Tamu

Kim Joo Heon

as Seo Chung Myeong [Dal Mi and In Jae's father] (Ep. 1, 4, 16)

Bintang Tamu

Jo Ah Ra

as Assistant Manager Jung [Sa Ha's sister] (Ep. 2-3, 13, 16)

Bintang Tamu

Yu Seung Il

as [Cheon Ho's father] (Ep. 3)

Bintang Tamu

Hong Boo Hyang

as [Cheon Ho's mother] (Ep. 3)

Bintang Tamu

Ko Seong Jun

as [In Jae's developer] (Ep. 4)

Bintang Tamu

Oh Young Mi

as [Student's mother] (Ep. 5, 9)

Bintang Tamu

Seol Chang Hee

as [Cheol San's co-worker] (Ep. 6)

Bintang Tamu

Park Se Jun

Composer

Oh Choong Hwan

Sutradara

Park Hye Ryun

Screenwriter