The Rising of the Twilight God Slayer

The World has already Ended, Kaiser is the last survivor in the apocalypse world who fought the 12th demigod alone and won however the 12 demigod was not the mastermind behind the chaos and destruction, it was the “Outer God” who was the root of all destruction and world domination. Unfortunately, the 12th demigod has revived again and sealed him using Forbidden magic: Unlimited Imprisonment in the abyss for 10,000 years. 10,000 years later goddess of time and space aria makes a contract with him and frees him from imprisonment. what will the fate of the young man who decided to fight fate and save the world?