Boy group MustB has released a teaser video for its new song 'Realize'.

On the morning of July 15, a teaser video for MustB's new song "Realize" was released through its official account. In the teaser video released, scenes of members running toward the light, each with different wounds, met with sensuous visual beauty with outstanding colors, creating a strong atmosphere.

In particular, part of the new song "Realize" has been released along with a spectacular video. With a simple yet sensuous sound added to the intro and beat, member Soo-hyun's narration is raising expectations for MustB's new look, which has transformed from a bright image to a strong manly man.