ATBO have dropped their concept trailer for 'The Beginning : 飛上'.

The teaser video features ATBO in a black-and-white flight into the past and then into the future, revealing more of their comeback concept. 'The Beginning : 飛上' is the group's 3rd mini album set to drop on May 18 KST.

Watch ATBO's concept trailer above, and let us know what you think in the comments below.