Game and survive(Selena and Harry)

A misterious letter send to Selena,demi,perrie,Eleanor,miley,Harry,niall,zayn,Louis and liam. it said lets play a game. all of them were confused.the last part said if you don't your whole family would die even you. so they all accept it. Selena and Harry met than fall inlove. they fight alot but still inlove. but the last part when the game is almost finish. there is one promble. one of them have to survive.