Reincarnation Love in an Absurd World

In the future world, people have been greatly satisfied materially, but I don't know since when, all the order in the world has become an era ruled by violence, and a large number of rare beasts have appeared in the world. As the reincarnation of Kunlun Xu's disciple, the male protagonist must stop all this, but the appearance of the younger junior sister has disrupted everything of the reincarnated male protagonist. Can they survive in the absurd world, and can the world return to normal?