The YouTube channel肌肉山山jiroushanshan operated by the Korean sibling-pair, Shan Shan and Song Song, released a prank video featuring GOT7's Jackson.
Shan Shan tricks his older sister Song Song into making a reaction video of the music video "Different Game" by Jackson Wang when the idol himself appears.
Apparently, Jackson himself is a huge fan of the YouTube channel and personally DM'ed Shan Shan asking if he could feature in their videos.
That's so cute. Jackson fanboying and trying to get their channel to have a fandom name.