[From Earth to the interstellar age + mechs + multiple female leads + decisive and ruthless protagonist]
Humanity created AI, and then AI unleashed a cataclysm that destroyed the world.
The apocalypse began.
Humans on Earth could only eke out a living beneath alien spaceships disguised as AI.
After an accident, Zhang Feng
obtained an AI core.
From then on, he began to surge ahead.
What?!
He piloted a small mech and left a medium mech utterly unable to fight back?!
What?!
He piloted a medium mech, and Jiang Ran could even blow up a large mech?!
What?!
He could even build mechs!
And so,
he piloted the strongest mech,
and helped humanity set out for the stars!