King of Calamity

Bran, a man with many regrets, has lived a life of pity and depression. His family fell, and he was left alone to fight in a war against the Demon King, Bael. Long and arduous in his battle, he lost many friends to the demon's hands. The world fell to ruins, and the gods dead. Bran was left alone, fighting to his last breath. As the Demon King stood above him, bleeding and bruised, Bran coughed up a globule of silver blood. "How dare you destroy everything!? Have you no care for anything?" With a laugh, the Demon King, disregarding the man lying beneath him, took to the skies, leaving him to die.

As Bran lay there on the gritty and dead ground, the life fading from his eyes, footsteps echoed from behind. Gilfia, the goddess of life and love, offered an opportunity: Go back to the past and save the world from darkness. With a heavy breath, Bran accepted and found himself in his bed 18 years in the past. Will Bran be able to save his loved ones and the world itself, or will the demon king still destroy everything, leaving nothing but a planet of dust? Follow Bran's sorrow-filled journey in the past to save the world from darkness and fix his mistakes; follow The King of Calamity!
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Will post one chapter every 1-2 days until I've reached chapter 10. Then, I'll switch to a weekly upload schedule to stockpile a bit

This, most likely, will not have a harem. There's like a 1% chance that it will have one.