"ARS" is from ‘ars longa vita brevis’ which is Youngjae's favorite quote from Latin which means "Art is long Life is short". He use it as his official composer name. He's used it for years and has a tattoo of it as well as it being part of merch lines he's dropped. His fans are called Arsonists (we used to go between that and arsnation but arsonists is just more fun). 333 is somethig youll see with him a lot as well, and 3 on its side(openings facing down) looks like cyj in a way, so youll see a lot of ars and 3's on his stuff. :) also he has live performances of vibing and tasty on the its live kpop band thing as well if you want to check them out!! he had so much fun. in the behind the sceens one of the pds said to youngjae that he was having fun learning how talented the got7 members are and how good they are at singing as they one by one come for their solo promotions so stinking sweet. As an added fyi got7 info Jay B's prod. name used to be defsoul but is now just def. and you'll see palm trees with him a lot. Actually, in their group friendship necklaces that add up to make the got7 logo yj has a 3 and jb has the palm tree.