BTS (Bangtan Boys) made all their fans happy with the latest MV release for "War of Hormone" (previously called "Hormone War"), and they've now followed it up with behind-the-scenes goodies!

In a new video, the boys take fans through the process of creating the awesome concept photos and MV through these bts videos, showing that it was not all work but some play. They have fun fooling around and making derpy facial expressions for fans' enjoyment, yet they also show their dedication to their work as they try different charismatic poses in front of the camera and stay out until nightfall.

SEE ALSO: BTS drop teaser video for new pop-up project 'MONOCHROME'

Check it out above!