Remember the "cute" commercial from two weeks ago where TVXQ / DBSK endorses the Korean milkshake beverage company Seol Reim? Well, E! News Korea spent some time with the boys during the filming and posted a behind the scenes video. The video showed off the charismatic personalities, especially Xiah Junsu. The video also revealed that the 30 second commercial took more than 12 hours to shoot! Anyways, check out the video below and it's english subbed thanks to mickytohos.