Boy group MustB is making a comeback with their new song 'Realize'.

A personal teaser image of MustB's new song "Realize" was released on its official account at midnight on July 13. Starting with Tae-gun, who has a casual style and intense eyes, the images of Woo-yeon, Doha, Su-hyun and Si-hoo drew attention from fans.

MustB is a boy band that debuted in January last year with its single album "I Want U" and stopped its activities after a car accident in April of the same year. Starting from this activity, MustB will reorganize its team from the existing seven-member group to the five-member group.

Meanwhile, MustB will release its first mini-album "Let me rise again" at noon on July 17.