You pick dragon, my cat becomes god. Your business how?

The Story

Evan Vance faces betrayal and abandonment during his own summoning ceremony, leaving him with an F-rank Shadow Cat. The Divine Tamer System soon awakens within him, transforming this dismissed creature into a god-tier Devouring Beast. It crushes city-destroyers and surpasses the legendary Void Devourer. Meanwhile, Iris Moore, who labeled herself a genius, remains unaware that the man she ditched has already left destruction behind. She does not know he is currently ascending to godhood while she stays oblivious to his rapid rise.