BTOB’s member Lee Chang-sub on Thursday confirmed that he would enlist in the Army next month.

“Changsub will begin his mandatory military service on Jan. 14, 2019,” said Cube Entertainment representing the singer. “As the artist wants a quiet enlistment, the specific time and date will not be announced to the public.”

Lee will be the second member to enlist, as the band’s leader Seo Eun-kwang started his mandatory duty in August.

(Cube Entertainment)

Lee’s first solo album “Mark” is slated for release Tuesday. The singer reportedly participated in writing lyrics for every song in the album including the lead track “Gone.” Bandmate Peniel shot the jacket photo of the album.

By Kim Hye-soo (clairek@heraldcorp.com)