BTOB's Changsub is just an ordinary office worker in the latest MV teaser for 'Outsider.'

In this new clip, Changsub is seen walking into a vintage office wearing a plain suit. He seems to be swamped with work and filled with fatigue while doing his office work.

Previously, BTOB 4 U has explained what their upcoming album is all about in a short clip.

Their new special album is set for release on August 30 KST. So stay tuned for just a week.