Yeonjun of boy band Tomorrow X Together will release his first solo track, "GGUM," on Sept. 19, his agency BigHit Music announced Monday.

"'GGUM' is a hip-hop track with a catchy electro sound, the first song from Yeonjun since his debut," the agency said in a press release.

The new music will showcase Yeonjun's rebellious side, marking a stark contrast to the fantasy fairy-tale concepts he has embodied as a member of Tomorrow X Together so far, according to the agency.

Yeonjun debuted as the oldest member of Tomorrow X Together in March 2019 and has demonstrated his talents in both vocals and dancing, the latter of which he flaunted through multiple dance challenge videos with other K-pop artists.

He released a soundtrack for the Coupang Play series "Cinderella at 2am" titled "Boyfriend" on Sept. 1.

BY YOON SO-YEON [yoon.soyeon@joongang.co.kr]