A Security Guard Without Superpowers Wants to Save the World

(No system, mortal flow, urban superpowers, group portraits) Facing a demonic catastrophe sweeping the world, some of the defeated humans gradually evolved superpowers and used this to stabilize the situation. As an ordinary person who has not evolved superpowers, Liu Xiao can only work as a security guard. However, there is also a day when a small security guard can counterattack. A small security guard also wants to kill all the demons in the world and save the world. But on the road to saving the world, are the devils the only ones standing in the way?