Boy Groups

TST Members Profile & Facts

TST

TST (일급비밀), aka Top Secret, is a South Korean boy group that debuted on January 1st, 2017, with the mini album “Time’s Up“ under JSL Company (later known as KJ Music). The group currently consists of four members, Ain, K, Wooyoung, and Yonghyeon.

TST Profile

Debut: January 1st, 2017
Active Years: 4
TST Members: Ain, K, Wooyoung, Yonghyeon, Yohan
Genre: Dance, Ballad
Status: Inactive
Label: JSL Company (KJ Music)
Oldest Member: Ain
Youngest Member: Yonghyeon
Fandom Name: HANA (하나)
Former Members: Junghoon, Kyeongha

TST Facts:

– TST released their latest single, “COUNTDOWN”, on January 2, 2020.
– The group’s greeting is “TST, shh! Hello, we are TST!”.
– The group is also known as Top Secret and 7STONE.
– Three group members, K, Ain and Yohan, were former members of the band NOM.
– The group released four single albums and two EPs since their debut in 2017.
– Kim Seung-ho, who composed Eric Nam’s song “Honestly”, and lyricist Oh Ye-won, who wrote mega-hit songs for EXO, Ailee and Girl’s Day, participated in the group’s fourth album “COUNTDOWN”.
– The group’s popular songs include “Mind Control”, “She”, “Paradise”, and “COUNTDOWN”.
– One of the former members, Kyeongha, was charged with sexual assault on May 24, 2018, and was sentenced to 18 months imprisonment with three months probation and 40 hours treatment program on May 31, 2018.
– Kyeongha was announced to have left the group on June 11, 2018.
– The group was set to perform on M Countdown, but it got canceled after Kyeongha’s news broke out.
– On June 16, 2020, Yohan unexpectedly passed away at 28, and the cause of death was not revealed due to the family’s request.
– TST members has been inactive since 2020 and is rumored to be disbanded.

Social Media Handles
Instagram: fs7official
Youtube: TOPSECRETofficial
Twitter: FS7_official
Facebook: officialFS7
Cafe Daum: FS7official

Streaming Platform Links
Genie | Spotify | Bugs | Melon | Apple Music

TST Members Profile

1. Ain

Ain TST
Ain

Stage Name: Ain (아인)
Birth Name: Kim A In (김아인)
Occupation: Singer, Dancer
Birthday: February 15, 1994
Age 30 (in Apr 2024)
Active Years: 11
Zodiac Sign: Aquarius
Height: 182 cm (6’0″)
Weight: 64 kg (141 lbs)
Nationality: Korean
Blood Type: O

Ain Facts:

– Ain is the leader, main dancer and vocalist in the group.
– He dislikes marshmallows.
– Red and purple are his favorite colors.
Read More Facts About Ain

Social Media Handles
Instagram: ainismxx
Youtube: YO-I요아이
Twitter: AIN8008

Streaming Platform Links
Genie | Bugs | Melon

2. K

K TST
K

Stage Name: K (케이)/ Seo Yuan (서유안)
Birth Name: Kim Hyeong In (김형인)
Occupation: Singer, Composer
Birthday: May 6, 1991
Age 32 (in Apr 2024)
Active Years: 11
Zodiac Sign: Taurus
Height: 178 cm (5’10″)
Weight: 63 kg (139 lbs)
Nationality: Korean
Blood Type: AB

K Facts:

– K is the lead vocalist in the group.
– He can also compose songs.
– He likes to eat corn.
Read More Facts About K / Seo Yuan

Social Media Handles
Instagram: seo_yuan
Youtube: YU AND
Twitter: seo_yuan
TikTok: @seoyuan

Streaming Platform Links
Genie | Bugs | Melon

3. Wooyoung

Wooyoung TST
Wooyoung

Stage Name: Wooyoung (우영)
Birth Name: Choi Woo Yeong (최우영)
Occupation: Singer
Birthday: May 14, 1996
Age 27 (in Apr 2024)
Active Years: 7
Zodiac Sign: Taurus
Height: 178 cm (5’10″)
Weight: 60 kg (132 lbs)
Nationality: Korean
Blood Type: A

Wooyoung Facts:

– Wooyoung is the lead dancer, rapper and vocalist in the group.
– His MBTI is ISTJ.
– He likes to stay fit and work out.
Read More Facts About Wooyoung

Social Media Handles
Instagram: wy0514

Streaming Platform Links
Genie | Bugs | Melon

4. Yonghyeon

Yonghyeon TST
Yonghyeon

Stage Name: Yonghyeon (용현)/ UO (유오)
Birth Name: Kwon Yong Hyeon (권용현)
Occupation: Singer
Birthday: December 18, 1996
Age 27 (in Apr 2024)
Active Years: 7
Zodiac Sign: Sagittarius
Height: 175 cm (5’9″)
Weight: 58 kg (128 lbs)
Nationality: Korean
Blood Type: AB

Yonghyeon Facts:

– Yonghyeon is the main vocalist and maknae in the group.
– He was born in Busan, South Korea.
– He is friends with Uin and Gyeongtae.
Read More Facts About Yonghyeon / UO

Social Media Handles
Instagram: uo.home

Streaming Platform Links
Genie | Spotify | Bugs | Melon

5. Yohan

Yohan TST
Yohan

Stage Name: Yohan (요한)
Birth Name: Kim Jung Hwan (김정환)
Occupation: Singer
Birthday: April 16, 1992
Age 32 (in Apr 2024)
Active Years: 8
Zodiac Sign: Aries
Height: 180 cm (5’11″)
Weight: 64 kg (141 lbs)
Nationality: Korean
Blood Type: O

Yohan Facts:

– Yohan was the vocalist in the group.
– He knew beatboxing.
– He did not know how to swim.
Read More Facts About Yohan

Social Media Handles
Instagram: yohanee0416
Youtube: YO-I요아이
Twitter: K_jeonghwan

Streaming Platform Links
Genie | Bugs | Melon

FORMER MEMBERS

6. Junghoon

Junghoon TST
Junghoon

Stage Name: Junghoon (정훈)
Birth Name: Lee Jung Hoon (이정훈)
Occupation: Singer, Rapper
Birthday: October 18, 1996
Age 27 (in Apr 2024)
Active Years: 7
Zodiac Sign: Libra
Height: 175 cm (5’9″)
Weight: 58 kg (128 lbs)
Nationality: Korean
Blood Type: AB

Junghoon Facts:

– Junghoon was the rapper in the group.
– He has a brother and sister.
Read More Facts About Junghoon

Social Media Handles
Instagram: hoon_9_6
Youtube: HoonheeTV

Streaming Platform Links
Genie | Bugs | Melon

7. Kyeongha

Kyeongha TST
Kyeongha

Stage Name: Kyeongha (경하)
Birth Name: Lee Kyeong Ha (이경하)
Occupation: Singer
Birthday: August 3, 1998
Age 25 (in Apr 2024)
Active Years: 2
Zodiac Sign: Leo
Height: 174 cm (5’9″)
Weight: 57 kg (126 lbs)
Nationality: Korean
Blood Type: O

Kyeongha Facts:

– Kyeongha was the rapper and maknae in the group.
– He auditioned in “The Unit” and passed but failed the first round.
Read More Facts About Kyeongha

Social Media Handles
Instagram: kyeongha0803

NOTE: Which TST member caught your eye first? Let us know your story in the comments down below!

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WRITTEN BY

Lilian Chen

Yo! I'm Lilian, an Ahgase and a curious wordsmith on a never-ending quest for knowledge. Don't hesitate to spot any slip-ups in my work and feel free to reach out with additional facts & insights! ^^

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