The B2ST boys said their goodbye on the October 29th episode of Music Bank. It has been a pretty short promotion period with "Soom" as the B2ST boys will now start to prepare for their upcoming debut in Japan and solo concerts in Korea at the end of the year. But rest easy, as B2ST will also return in mid-November for follow-up promotions! Check out their heart-stopping "Soom" performance below. http://www.youtube.com/watch?v=RC3H-BCcl7o