stray kids was doing a YouTube video, called "사우나! PT. 1 EP. 1 Suana" and Changbin always noticed that seungmin was left out.. expect for when Lee know and him were putting face masks on each other.. Changbin always laughed when han fell or tripped on something..

"Your so clumsy han!"

Changbin noticed that seungmin hides his smile also.. he seems worried about that..