After the Earth Passes Through a Black Hole

"Sister, the moon exploded!" When Ning Zifei was lying on the window and shouting, Ning Xiaohan's first thought was that he was joking again. If the world hadn't fallen into darkness the next morning, if people who had long since passed away hadn't appeared on the street, Ning Xiaohan might have tricked him back. Unfortunately, there is no if in the world!