Spoilers

The story begins with a weak guy wanting revenge and meets a powerful worm to help him in his journey. He gets through his strong enemies with determination and effort, mostly through his intelligence and also teamwork.

But as he get stronger and stronger, he starts to realize that the people around him cares for him and he starts to appreciate them.

New powers , more spirits and also friends to help him along the way, the story is quite interesting to read. As the world unfolds, enemies with kinda hacking technology comes in and it becomes a fight or protect my country.