Miraculous vampire

There is a project that the Ms Bustiers class is doing for the celebration of Ladybug and Cat noir. What happens when Adrien and Marinette are partners? Will they reveal?

And Alya and Nino are vampires and everyone else is human. When Nino and Alya ask to see Marinette and Adrien after school somewhere what will happen to them? Will they become immortal like Alya and Nino?