JYJ's Kim Jaejoong has released a new single for his fans while he currently serves in the military.

On Tuesday, Jan. 26, the singer-actor released his single titled "You Know What?" ahead of his upcoming second album.

The single tells about love and how couples fight over small things because they want to impress each other.

In addition, C-jeS Entertainment mentioned how much the upcoming album meant a lot to Jaejoong.

"The album was created as a gift for the fans and will consist of songs made by either Jaejoong or other famous songwriters from abroad," said C-jeS Entertainment, as reported by K-Pop Herald.

"Including the songs unveiled at the latest concert, the track list is sure to satisfy the public."

The production of the album was completed before Jaejoong entered the military on March 31, 2015.

Jaejoong's upcoming album is going to include 12 tracks from a variety of genres, such as British pop, hard rock, blues, and ballads.

Jaejoong is expected to be discharged from the military on December 30, 2016. His album will be officially released on Feb. 12.

Meanwhile, Jaejoong is not the only one who will release a solo album, member Park Yoochun released his first album on Jan. 18.