Back in December, B2ST announced that they'll be embarking on a 21-city world tour, starting in Seoul. To build hype for their two Seoul concerts on February 4th and 5th, Cube Entertainment has shared a 'teaser video' featuring member�Yang Yoseob. In the clip, Yoseob reminisces over B2ST's previous concerts on his iPad, while musing over the elements that make a beautiful show. Check out Yoseob's trailer below, and stay tuned for more updates on B2ST's upcoming concert!