The Girl Who Picked up the God-Killing Weapon in the High-Tech Apocalypse

Lorraine traveled to a high-tech world ruled by omnics and humans were reduced to pets. He was forced to participate in a battle royale, forced to accept the superpowers given by omnics, and then forced to form a contract with the omnics' former emperor, a god-killing weapon. Now, the omnics regard him as the number one blasphemer, and his only way to survive is to find more lost god-killing weapons and let them fight for him.