Story
The world was destroyed. A world filled with death and despair. The one who fought with a sword until the end — Sword God. Karselian Le Vandeyan. However, as if by fate, the door to another world opened, and this time… It was the Earth that had not been destroyed. There, monsters slowly appeared, and people were still living without knowing how great this disaster was. This world had not yet been destroyed. However, the moment they let their guard down, that terrible nightmare from the past would repeat itself. To prevent that Sword God takes up his sword again.
Synopsis via AniList (English).
Preview
Promo video for this title.