The SSS rank lord was once an angel.

As a fallen angel opposing the gods for humanity's sake, I faced laughter from divine beings. In response, they cast me down to endure mortal pain. 'Damn you, gods! I'll live a better life, becoming the global lord, seeking to kill each one of you for humanity's sake.' I closed my eyes in the face of laughter and those creepy faces. Consumed by hatred and a thirst for revenge, my only mistake was pitying suffering mortals. Is it fair to put them on trial and play with their lives just because they are mortals? For humanity's sake, I'll get my revenge. Just because we are good people, we don't deserve to be trampled. Just wait; I'll show you the real hell every day, you immortals