Sung Hyuk Seo

Seo Sung Hyuk

  • Name: Seo Sung Hyuk
  • Native name: 서성혁
  • Also Known as: Seo Seong Hyeok
  • Nationality: South Korean
  • Gender: Male
  • Born: April 26, 1999
  • Age: 26
Seo Sung Hyuk is a South Korean singer, dancer, and former member of RAINZ (레인즈) and TAN (티에이엔). He graduated from Bucheon Sangwon High School and is enrolled in the Acting program at Baekseok University of Arts.

He participated in the singing survival show "Produce 101 Season 2" and finished in 31st place. However, after the show concluded, fans began petitioning MNet to create a project group with popular contestants outside of the Top 10. So, the Japanese agency KISS Entertainment (キッス・エンタテインメント) took over the fan request.

He made his debut in October 2017 as RAINZ's main vocalist and maknae with their first EP, "Sunshine". The group signed a one-year contract and officially disbanded in October 2018, when they concluded the last group activities in Japan.

He made his acting debut in 2017 with a role in the web drama "3AM Season 2" (새벽세시2).
In 2019, he made his debut as a soloist with the single "Moonlight Song".

In late 2021, he entered the singing survival show "Extreme Debut: Wild Idol" and finished in 4th place, earning a spot in a new project group called TAN. He signed a two-and-a-half-year contract with Think Entertainment (생각엔터테인먼트) and re-debuted in March 2022 with their 1st mini-album "1TAN" as the lead vocalist.

However, the agency became embroiled in several controversies, and all members ended their contracts in June 2024. A few weeks later, leader Lee Chang Sun announced the group's disbandment.

He enlisted for his mandatory military service on January 20, 2025 and will be discharged on July 19, 2026.

(Source: kisskh) Edit Biography
Drama
Year Title # Role Rating
2021 High! Touch
Korean Drama, 2021, 6 eps
Seo Eun Jae (Main Role)
6
Seo Eun Jae
Main Role
6.8
2020 Winter Vacation
Korean Drama, 2020, 6 eps
Seo Eun Jae (Main Role)
6
Seo Eun Jae
Main Role
6.6
2019 Summer Vacation
Korean Drama, 2019, 6 eps
Seo Eun Jae (Main Role)
6
Seo Eun Jae
Main Role
6.9
2017 3 AM Season 2
Korean Drama, 2017, 6 eps
(Main Role)
6
Main Role
6.7
TV Show
Year Title # Role Rating
2023 Secret Tour
Korean TV Show, 2023, 30 eps
(Ep. 12) (Guest)
30
(Ep. 12)
Guest
0.0
2022 2022 Idol Star Athletics Championships Chuseok Special
Korean TV Show, 2022, 3 eps
(Regular Member)
3
Regular Member
7.7
2022 Midnight Idol Season 3
Korean TV Show, 2022, 50 eps
(Ep. 26) (Guest)
50
(Ep. 26)
Guest
7.7
2022 Secret Airlines
Korean TV Show, 2022, 21 eps
(Ep. 12, 20) (Guest)
21
(Ep. 12, 20)
Guest
0.0
2022 Dancing Dol Stage
Korean TV Show, 2022, 3 eps
(Regular Member)
3
Regular Member
8.4
2022 We Are a Family
Korean TV Show, 2022, 2 eps
(Regular Member)
2
Regular Member
0.0
2022 Studio Moon Night Season 2
Korean TV Show, 2022, 47 eps
(Ep. 166) (Guest)
47
(Ep. 166)
Guest
8.5
2021 2021 MBC Music Festival: Together
Korean TV Show, 2021, 1 eps
[Performer] (Regular Member)
1
[Performer]
Regular Member
8.1
2021 Extreme Debut: Wild Idol
Korean TV Show, 2021, 13 eps
[Contestant] (Regular Member)
13
[Contestant]
Regular Member
7.8
2021 Midnight Idol Season 2
Korean TV Show, 2021, 150 eps
(Ep. 108, 136) (Guest)
150
(Ep. 108, 136)
Guest
8.6
2021 Studio Moon Night
Korean TV Show, 2021, 156 eps
(Ep. 142) (Guest)
156
(Ep. 142)
Guest
8.4
2020 Master Kwang of the Photo Studio
Korean TV Show, 2020, 20 eps
(Ep. 23) (Guest)
20
(Ep. 23)
Guest
0.0
2019 Lunch Attack
Korean TV Show, 2019, 890 eps
(Ep. 673, 743) (Guest)
890
(Ep. 673, 743)
Guest
6.0
2017 Produce 101 Season 2
Korean TV Show, 2017, 11 eps
[Contestant] (Regular Member)
11
[Contestant]
Regular Member
8.3
2016 Fact iN Star
Korean TV Show, 2016, 200 eps
(Ep. 50, 64) (Guest)
200
(Ep. 50, 64)
Guest
8.2
2015 King of Mask Singer
Korean TV Show, 2015, 550 eps
[Contestant] (Ep. 476-477) (Guest)
550
[Contestant] (Ep. 476-477)
Guest
8.0
2013 After School Club
Korean TV Show, 2013, 675 eps
(Ep. 306, 532, 546, 566) (Guest)
675
(Ep. 306, 532, 546, 566)
Guest
7.8
2011 Weekly Idol
Korean TV Show, 2011, 715 eps
(Ep. 626) (Guest)
715
(Ep. 626)
Guest
8.1
2011 Immortal Songs: Singing the Legend
Korean TV Show, 2011, 750 eps
(Ep. 600-601, 603) (Guest)
750
(Ep. 600-601, 603)
Guest
8.2
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Seo Sung Hyuk

Sung Hyuk Seo
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Details

  • First Name: Sung Hyuk
  • Family Name: Seo
  • Native name: 서성혁
  • Also Known as: Seo Seong Hyeok
  • Nationality: South Korean
  • Gender: Male
  • Born: April 26, 1999
  • Age: 26

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