Pre-debut activities: The Opening Seungwon was a child model, actor and a former member of the kid group 'USS.O Boy' under the stage name 'U.Win'. Eunho was also a child model. NTX released a series of pre-debut singles to introduce the group named
The Opening, starting with
The Opening: Public, followed by
The Opening: Basic Yell,
The Opening: Herma and
The Opening: The Finale, the group promoted the lead singles on
South Korean music programs. The group were originally scheduled to debut in January, but due to the aftermath of
COVID-19, their debut was postponed.
2021–2024: Debut with Full of Lovescapes, TAN, departure of Gihyun, "Latecomer", Peak Time, Odd Hour, "X-Present", Hold X and departure of Jiseong On March 30, 2021, NTX made their official debut with their debut EP
Full of Lovescapes, with the title track "Kiss The World". On April 30, 2021, it was announced that the group would have their first standalone mini concert 'For You', to be held on May 29, 2021. In September 2021, Jiseong appeared on the survival reality show
The Wild Idol as a contestant, he ranked 3rd on the final episode, allowing him to debut in the project boy group
TAN. On November 6, 2022, Victory Company announced that Gihyun has left the group for personal reasons. They later released their first single album
Latecomer on November 23. In 2023, the group appeared on the South Korean reality show
Peak Time as Team 2:00, where they made it to the third and penultimate round before being eliminated. On October 25, 2023, it was announced that NTX will be releasing their first full-length album,
Odd Hour, on November 15. On June 25, 2024, NTX announced that they will be releasing their second mini album,
Hold X, on July 9. Four days later, TAN member Changsun announced on TAN's official fan cafe that the group had disbanded. Victory Company later announced that Jiseong will not participate in NTX's upcoming comeback and will be taking time to rest before resuming his activities with the group. On December 11, 2024, it was announced that Jiseong has left the group and Victory Company due to differences in the directions either party wants to go in.
2025–present: Over Track On January 23, 2025, it was reported that NTX will be releasing their second full-length album in March. On February 18, they announced their second full-length album
Over Track, set for release on March 10. NTX is set to perform in
Manila on October 19, 2025, as part of IAM WORLDWIDE 's anniversary show dubbed DOMIN8 along with fellow Korean star
Ji Chang-wook and Philippine pop group
Bini. On November 6, 2025, NTX released their new mini album "Proto Type" ==Members==