TAN

On August 4, the Korean characters of the group's name was changed from "탄" to "티에이엔". On October 1, a teaser was released revealing that they would release their first single album "Dream & Deurim" on October 11. On November 12, they announced that they're going to hold their first America tour TAN 2023 America Tour, revealing also Brazil and United States dates on November 16 and November 26.

On December 5, they announced that they will hold their first Japan concert TAN Japan 1st 'To All Nations' from December 9 to December 25. On December 10, they revealed their first two new sub-units, kimseobanglim and Shmallow through two songs as part of TAN CIVIL WAR where the two units will release songs. On February 23, 2023, a teaser revealed that they would release their first special album Essege on March 10.

On July 25, the group posted a teaser announcing that they would release their third mini album Tan Made on August 11. The mini album was then released with "Heartbeat" as the album's title track. On July 31, the concert dates for their second America tour [[TAN MADE 'I' Tour|TAN MADE [I] Tour]] was announced.

The first date was to take place on September 28 in Fresno, California. A pop up event was then announced on September 26 to take place the next day. On September 27, it was announced that Hyunyeop is unable to attend the tour due to unavoidable circumstances.

On October 26, the group announced that they will release their pre-debut Japanese mini album Proxima on December 26. On March 10, 2024, TAN released the digital single "Seven Forever", which includes the reinterpretations of five songs from Wild Idol, to celebrate the group's second debut anniversary. On March 11, the group unveiled the promotion schedule for their first full-length album, W Series '3TAN' (World Ver.

), which will be released on March 28. On June 29, Changsun announced on the group's official fan cafe that the group had disbanded and he is stepping down as leader as he leaves the idol industry.