A Crumbling World, I Yearn for Redemption

"How can a heartless person move forward?" "If you need me, I will give you my all." "The Hokushin Ittō-ryū is the strongest and invincible style!" "I almost destroyed the world..." "You are saved, but who will save me?" The purple-haired god couldn't grasp that hand in the end. —The world was saved, but what about her? "Humans, if you must sacrifice her to bring back your smiles, then I will bring you destruction!" (ps: The synopsis is weak; the plot is definitely not like this!)