Traveling Through Time to Cultivate Immortality: Traveling to the Opposite Side

"Because of an accident, my girlfriend and I traveled through time. I traveled through time and became the body of a loser. The former genius fell into a mortal state. I want to counterattack and change my destiny!" I want to become an immortal! I also want to find out where my girlfriend is! ! The God of Killing kills the devil and kills everything. When I became a genius among geniuses, when I came back to my senses, I realized that my girlfriend was actually my opposite. Why did she dress up as a demon saint? ! Should I choose to become a god or choose a girlfriend? !