Overview: Oh, I missed you, ATBO! Before its debut, ATBO goes for the first ATBO’s workshop for team building. But! The ship is cancelled due to the misty weather??!!! SEUNGHWAN: This isn’t a hidden camera show, is it? Production Crew: No...T.T Things get tough outside the house... A chaotic ATBO WALKSHOP [The Beginning] , please look forward to it!