underground is something that beneath something. it's hidden. concealed. maybe also can be defined as illegally known. illegally active. barely be seen. or i don't know, NOT IMPORTANT. trash. ugly. stink?
'upperground' is something that u see. something that u want to catch along wherever you go. something that you proud of. that u wana show up to the whole world. something you appreciate from outside and also from the inside. something that is REALLY IMPORTANT.