Global Mutation: I Upgrade Alone

In 2020, a change swept the world. In 2040, a figure who stood at the top of his previous life was attacked by a mysterious man and was reborn 20 years later. Kill the monster alone at the beginning, and the system will be activated when you are about to die. He wants to explore the mystery of this change and avenge the hatred of his previous life. He will reach the top again. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.