Why Is That Red-Clothed Demon King Reborn Again? !

[Reincarnated Demon Lord] + [Shinto] + [Decisive Killing] + [No Harem] Disasters from other worlds are coming, and human civilization will be extinguished. On that day, humans will no longer be the masters of the world, and this will eventually be an era where humans and "beasts" coexist... When the beast tide strikes, disaster strikes, and when the building is about to collapse, a figure in red is seen standing on the ruins of civilization. The red robe is stained with blood, laughing wildly, Facing all the living beings praying to him, he almost went crazy: "Savior?! Sorry, I am a devil!"