Its the answer behind the sadness of Jin in I need u mv , here you can see in the final that yoongi its not there so no one of them are alive because they died in i need u mv, when all of them are together is jut the memory of Jin, he keep thinking all are alive but they are not , just him and taehyung but at the end he will decide to die, thats why he jump from that thing in the beach. So now we go to i need u mv , Jin was the one one who was crying all the mv bc the other 6 weren't there anymore, the 6 petals represent each one .