TXT's Yeonjun is ready to debut solo with his first mixtape titled 'GGUM.'

On September 17 at midnight KST, Yeonjun released a mood teaser image for his upcoming solo mixtape. In the teaser image, someone is seen stepping into a neon pink goo, bringing curiosity about Yeonjun's upcoming new music.

Meanwhile, Yeonjun's official solo debut is scheduled for September 19 at 6 PM KST.

SEE ALSO: "Who is Matthew?" BTS's RM hilariously responds to a fan letter on Weverse