TST Members: Ages, Heigt and Facts

TST, formerly known as Top Secret, is a South Korean boy band formed by JSL Company (which later changed its name to KJ Music Entertainment) in 2017.

TST Members

TST has started its journey with seven members. Later the band had to part ways with 2 members. In addition, there was the tragic death of member Yohan.

On January 2, 2020, TST released the single “Countdown” with four members.  Since October 2020, TST has not been active.

Ain

Ain was born in Asan, South Korea on February 15, 1994. He’s a singer signed with KJ Music Entertainment.  He’s the leader, vocalist, and main dancer of TST.

Ain is a former member of another group called NOM and his zodiac sign is Aquarius. Before joining TST, he was a dance teacher. On April 6, 2020, Ain joined the military in the 22nd Infantry Division’s band.

• Age:  30 Year
• Height:  182 cm (6’0″)
• Nationality: South Korean

Yohan

Yohan was a South Korean singer under KJ Music Entertainment. He was born on April 16, 1992, in Ulsan, South Korea. Yohan was part of the boy band TST and a former member of NOM. He started his music journey in 2013 with NOM.

Yohan joined TST on January 4, 2017, when they released their first mini-album “Time’s Up”. In TST, he was a vocalist. His zodiac sign is Aries.

Sadly, Yohan passed away on June 16, 2020, at the age of 28. The cause of death wasn’t disclosed as per the family’s request.

• Age: 28 years old
• Height:  180 cm (5’11″)
• Nationality: South Korean

Wooyoung

TST member Wooyoung was born in South Korea on May 14, 1996. He is a South Korean singer under KJ Music Entertainment.

Wooyoung started his journey with TST on January 4, 2017. He was the lead dancer and also the vocalist and rapper. In 2019, Wooyoung left TST due to health concerns.

• Age: 27 years old
• Height:  178 cm (5’10″)
• Nationality: South Korean

Junghoon

Junghoon is a singer and YouTuber from South Korea. He was born in South Korea on October 18, 1996. He auditioned for a show called “The Unit” but got eliminated after the first round. He joined TST on January 4, 2017. He was the rapper in the group. On October 16, 2020, he left TST and started a YouTube channel with his girlfriend.

Junghoon’s zodiac sign is Libra.

• Age: 27 years old
• Height: 5’9″ (175 cm)
• Nationality: South Korean

K

K, also known as Kim Hyeong In, is a South Korean singer under KJ Music Entertainment, born in Gwangju, South Korea on May 6, 1991. He’s the eldest member of TST. He loves music and dancing, feeling thrilled onstage, which led him to become a singer. His zodiac sign is Taurus, and he enlisted in the military on March 21, 2019.

K released his digital single “Missing You” on April 10, 2021.

• Age: 32 years old
• Height:  5’10” (178 cm)
• Nationality: South Korean

Yonghyeon

Yonghyeon, also known as UO is a South Korean singer and songwriter under Nature Space. He was born in Busan, South Korea on December 18, 1996.

On January 4, 2017, Yonghyeon joined TST. His positions in the group were main vocalist and maknae.

He made his solo debut on April 13, 2023, with the mini-album “Restart”.

• Age: 27 years old
• Height:  5’9″ (175 cm)
• Nationality: South Korean

Kyeongha

Kyeongha is a South Korean singer born on August 3, 1998. He was the rapper of TST. On January 4, 2017, he joined TST. His Zodiac Sign is Leo.

In May 2018, Kyeongha was sentenced to 18 months in jail and 3 years of probation. On May 11, 2018, it was announced that Kyeongha was leaving the band because he didn’t want to harm his group, who were suffering due to their promotions being suspended.

About Kyeongha:

• Age: 25 years old
• Height:  5’9″ (174 cm)
• Nationality: South Korean

Who is your favorite TST member? Let us know in the comments.