I Became a Chosen One of the Ancient Gods

"The ancient deity on the verge of awakening drags civilization into the abyss, turning the world into a wasteland in need of a hero to save it. But who says saving the world must involve slaying the ancient deity? Becoming a follower of the ancient deity, devouring other monsters to evolve, and ascending to godhood to become the ancient deity yourself is also a viable solution, isn't it? Protagonist: No, I'd rather stay human. Apostle Female Lead: You're awake? The surgery was a success—you're now a follower of the ancient deity, just like me!"