TST, formerly known as Top Secret (), is a South Korean

boy band A boy band is loosely defined as a vocal group consisting of young male singers, usually in their teenage years or in their twenties at the time of formation. Generally, boy bands perform Love song, love songs marketed towards girls and young ...

formed by JSL Company (now known as KJ Music) in 2017. They debuted on January 4, 2017, with ''Time's Up''.

History

2017–2018: Debut, name change and Kyeongha's departure

On January 4, 2017, Top Secret debuted as a seven member group under KJ Music Entertainment with the mini album ''Time's Up''. The group then later came back with the mini album ''Wake Up'' on June 4, 2017. On April 3, 2018, the group changed their name from "Top Secret" to "TST". On May 23, 2018, TST released their first single "Love Story". This was Kyeongha's last release with the group. On May 24, 2018, it was reported that Kyeongha was found guilty of sexual assault. The victim stated that Kyeongha told her that she aroused his sexual desire while walking on the sidewalk, and when she ran away from him, he followed her into a building and sexually assaulted her in December 2014. His management agency denied the accusation, when the victim's online post began to circulate after his debut with the group. The victim then filed a lawsuit in April 2017. Kyeongha and his agency, JSL Company, denied the allegations and filed an appeal on May 29. On May 31, 2018 he received a prison sentence of 18 months in prison, with a probation period of three years, along with 40 hours of treatment program for sexual offenders. After news broke out,

M Countdown ''M Countdown'' () is a South Korean music program broadcast by Mnet. The show features appearances by popular music artists who also perform live on stage. It is broadcast from CJ E&M Center Studio in Sangam-dong, Mapo District, Seoul. Bro ...

decided to cancel TST's appearance on the show. On June 11, 2018, it was announced that Kyeongha left the group. On November 1, 2018, the group returned as a six member group with the single "Paradise".

2019–present: Wooyoung's hiatus, ''Wake Up'', K's military enlistment and Yohan's death

On February 11, 2019, TST released the extended play ''Wake Up'', which shares the same name as their second mini album. Wooyoung didn't take part in the EP and in the subsequent releases due to health issues. On February 20, 2019, KJ Music reported through TST's fan cafè that member K would be enlisting in the military to complete his mandatory service on March 21, 2019. On January 2, 2020, TST released the single "Countdown" as four members. On June 16, 2020, Yohan died at the age of 28. The cause of death wasn't revealed.

Former Members

* Ain (아인) * K (케이) * Wooyoung (우영) * Junghoon (정훈) * Yonghyun (용현) * Kyeongha (경하) * Yohan (요한)

Discography

Extended plays

Singles

References

External links

* {{Authority control K-pop music groups Musical groups established in 2017 South Korean boy bands South Korean dance music groups South Korean pop music groups Musical groups from Seoul 2017 establishments in South Korea