Doomsday: Summon Nakano Nino at the Beginning

The end of the world is coming, and as a selected boy, Zhang Yue has to fight for his family, country, and world. Fortunately, there is a summoning system that can help. Come, gather together the heaven and earth, the light of the universe, and the spirits of the ancestors, and press the call. My God of War is here! Um? Nakano Nino, which Valkyrie is this? Waiting online, urgent. It's a stream of consciousness, I write whatever comes to mind, there is no main line, so be careful when entering.