2PM Return With Lovelorn 'Promise (I'll Be)': Watch

Almost like clockwork, K-pop fans have come to expect an annual album from 2PM full of slick, R&B-inspired pop. The guys don't disappoint with their latest "Promise (I'll Be)," which leads off their new album Gentlemen's Game.

The new song opens with a tender piano backing the band's breathy croons, before a pulsating synth and horn blasts barge into the picture. The fast-paced production is reminiscent of the recent solo single by 2PM member Jun. K, "Think About You"... which isn't a bad thing, as the 28-year-old had one of K-pop's best solo releases of 2016 to date.