2AM has dropped the MV teaser for their upcoming title song.

As announced, 2AM is gearing up for their first full-group comeback in seven years. They will be releasing their 4th mini-album that contains five tracks in total, including the title song "Should've Known". As reported, the MV for this song will feature 2PM's Junho and actress Kim So Hyun. In this teaser, Kim So Hyun puts on a moody atmosphere as a soulful melody accompanies the visuals.

2AM's new album 'Ballad 21 F/W' will be released on November 1 at 6 PM KST.