AKMU will make a surprise comeback to the fall music scene with a new album on Sept. 25.

YG Entertainment released the teaser poster for AKMU's third full-length album "Hanghae" on its official blog at 10 a.m. on Sept. 9.

The poster said the phrase "AKMU 3rd FULL ALBUM [Navigation] 2019.09.25," which describes the album's form and date of its comeback, stimulated the fans' excitement index.

In the poster for the first portrait that offers a glimpse of AKMU's comeback concept, Chanhyuk and Suhyun displayed a more mature charm than before, raising expectations for a comeback.

Chanhyuk exuded a charisma ripe with a cardigan and a necklace, while Suhyun matched her long boots to a green dress to perfectly digest her refined style.

The AKMU's appearance, posing against the backdrop of a vast dark blue sea, created a lonesome atmosphere, evoking a feeling of autumn.

AKMU will stand in public with a musical spectrum that has been enriched in about two years and two months since "SUMMER EPISODE" released in July 2017.

It will be Chanhyuk's first public appearance since he was discharged from the military in May and the first new album to be released after Suhyun turned in her 20s, so she will be able to express AKMU's deeper musicality.

AKMU, which won the SBS audition program "K-pop Star Season 2" in 2012, has been recognized as genius musicians. It was loved by music fans by performing hit songs from various genres, including "200%," "Give Love," "LAST GOODBYE" and "DINOSAUR."