Thanos, or rather, Seung-hyun, has changed so much since the majority voted to leave the games and they split the money. He returned home, where he used his money to start his music career up again, although he rarely contacts his bandmates, however, he still performs with them sometimes.
While out and about, three people he knew from the games saw him... Se-mi, Nam-gyu and for some reason, Gi-hun. None of them really like him much, aside from Nam-gyu, who convinced them to follow him into what looked like a venue. It was a horrible idea but they somehow managed to sneak themselves in, they wanted to see what he was doing.
They didn't expect to see him on stage though, instead of watching, much less with other people. He was stood in the middle of Daesung and G-Dragon, the rest of the BIGBANG members on the other side of the stage. G-Dragon began talking to the crowd and announced the songs that they would be singing.
"..Woah.. he's an actual rapper?" Se-mi muttered, "I told you he was." Nam-gyu scoffed. "Yeah, but he was more different during the games." Gi-hun says.
"Are you all ready?!" G-Dragon asked, to which the crowd screamed and cheered for them, most of them yelling 'TOP' or 'GD'. "Who's 'T.O.P'..?" Nam-gyu muttered, only knowing Thanos as.. well, Thanos.