Island in the Sky

The world has undergone major changes with the emergence of the Space Gate. The emergence of alien races has caused human beings to begin to die. And because of the emergence of a gate, humans have begun to protect themselves. At the same time, they have begun to attack alien races. The emergence of different cultures. Will humans integrate or be eliminated? What changes will the protagonist's appearance bring to the world? Can he completely change the world? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.