Director
Screenwriter
Main Role
- Ji Sung Main Role
- Lee Hye Ri Main Role
- Kang Min HyukJo Ha NeulMain Role
- Chae Jung An Main Role
Support Role
- Gong MyungKyle Lee/Lee Bang Geul [Band member]Support Role
- Lee Tae SunNa Yun Soo [Band member]Support Role
- Lee Byung HunSeo Jae Hoon [Band member]Support Role
- Jung Man ShikJang Man Shik [Songwriter]Support Role
- Ahn Nae SangDirector ByunSupport Role
- Heo Jun SeokKim Joo HanSupport Role
- Jeon Noh MinLee Joon Seok [KTOP's CEO]Support Role
- Jung Kyu Soo[Suk Ho's father]Support Role
- Ahn Hyo SeopKim Jin Woo [Jackson's leader]Support Role
- Sung Byung Sook[Seok Ho's mother]Support Role
- Jang Won YoungMr. Ma [Reporter]Support Role
- Jo Yoon SeoLee Ji YeongSupport Role
- Jo Bok RaeJo Sung Hyun [Ha Neul's late brother]Support Role
- Maeng Sang Hoon[Jae Hoon's father]Support Role
- Choi Ji Na[Jae Hoon's mother]Support Role
- Jo Yeon HoNa Chan Hee [Yun Soo's son]Support Role
- Kim Kyung Ryong[Ji Yeong's father]Support Role
- Lee Rang Seo[Female college student]Support Role
- Choi Min YoungLee Kyung SooSupport Role
- Park Myung Shin[Jo Ha Neul’s mother]Support Role
Guest Role
- Kim Ho Chang[Manager]Guest Role
- Tae Hang Ho[Accident victim]Guest Role
- Sung Ji RuSound source broker Kim (Ep. 1-2)Guest Role
- Lee Han Wi[Broadcasting Company Director](Ep.1)Guest Role
- Choi Sung Min Guest Role
- Jo Jae Ryong Guest Role
- Park Shin HyeMiss Park (Ep. 3)Guest Role
- Min Do Hee[Luna Ex-KTOP Trainee/Twinkle] (Ep. 4)Guest Role
- Kim Ki Ri(Ep.4)Guest Role
- Seo Kang JoonLee Sang Won (Ep. 7-8)Guest Role
- Oh Jung Se[Prosecutor] (Ep. 7)Guest Role
- Ahn Suk Hwan[Psychiatrist](Ep.6)Guest Role
- Kwon Hae Hyo[Entertainment Station chief] (Ep. 6)Guest Role
- Jo Eun JiManager Jo (Ep.10)Guest Role
- Zhou Mi[The Show MC](Ep.7)Guest Role
- Ken[The show MC] (Ep. 7)Guest Role
- Kim So HyeChoi Ga Eun (Ep.11-12)Guest Role
- Park Ji Yoon[Interviewer](Ep.7)Guest Role
- Jung Ye Rin[The Show MC] (Ep. 7)Guest Role
- Lee Hyun WooChoi Jun Ha (Ep.14)Guest Role
- Park Eun BinSoo Hyun [Drummer] (Ep. 18)Guest Role
- Jung Chan[Wild Entertainment CEO](Ep.17-18)Guest Role
- Park Young Soo[CF director] (Ep. 17)Guest Role
- Im Do Hwa[The Show MC] (Ep. 18)Guest Role
- Jang Hang Joon[Ha Neul's drama director](Ep.18)Guest Role
- Kim Jae Il Guest Role
- Dong Yoon Seok Guest Role
- J.VinJackson band memberGuest Role
- SunJackson band memberGuest Role
- SignJackson band memberGuest Role
- J.JunJackson band memberGuest Role
- Kim Min HyukJackson band memberGuest Role
- Joey Albright[Top investor]Guest Role
- Lee Seung Hyub[MC](Ep.18)Guest Role
- Kwon Na RaSong Hee (Ep.1)Guest Role
- Ha Kyung Min Guest Role
- Jae Hyeong(Ep.2)Guest Role
- Ha Joon(Ep.2)Guest Role
- Han Dong Hwan Guest Role
- Yoon Gi WonPDGuest Role
- Kim Ji Eun[Female student]Guest Role
- Do Joon(Ep.2)Guest Role
- Lee Chae Kyung[Lawyer] (Ep.1)Guest Role
- Seo Kwang Jae Guest Role
- Jo Wan Ki[Composer]Guest Role
- Seol Chang Hee Guest Role
- Lee Seo Young[K-Top singer]Guest Role
Unknown
- Choi Seung Il Unknown
- Lee Jin Hee Unknown
- Kim Byung Chun Unknown
- Yang Seung Kul Unknown
Bit part
- Park Chan Min[Himself]Bit part
- Kim Kwang Hyunpolice officerBit part
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