B2ST released the making-of-video for their "Soom" MV on the morning of October 7th. The clip reveals the members' friendly and warm sides, such as when Doojoon and Dongwoon imitate the voices of other stars in order to make the fatigued staff members laugh. Doojoon even turned their deserted film set into a motor show and made a comedic introduction by using lead vocal Yoseob as one of the models. The boys were also revealed to be completely professional throughout the actual filming, as Yoseob sang live consistently for all his parts. The members each made sure to monitor their cuts as well. B2ST will be holding their comeback stage on Mnet's "M Countdown" on the 7th. Source + Photo: Newsen