2AM continues to prepare for their upcoming 4th album 'Ballad 21 F/W.'

As announced, 2AM is gearing up for their first full-group come back in seven years.

They will be releasing their 4th mini-album that contains five tracks in total, including the title song "Should've Known" along with "No good in good-bye," "Can't sleep," "Always Me," and "Proposal." The highlight medley also presented the lyrics to the highlight that was being sung on a simple white background.

2AM's new album 'Ballad 21 F/W' will be released on November 1 at 6 PM KST. So stay tuned until the release.