Kuro Elf ni Kawareta Ore no Dungeon Seikatsu: Sanshoku Furo to Jigoku-tsuki

Kuro Elf ni Kawareta Ore no Dungeon Seikatsu: Sanshoku Furo to Jigoku-tsuki is a Manga/Manhwa/Manhua in (English/Raw) language, ACTION series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.com fastest updating comic site. The Summary is

One day, a "calamity" comes and destroys the city, killing both the protagonist Kruz and his sister Arti. However, Before Kruz dies, he sees a dark elf girl named Enju whom he had met before. The girl says. What do you want, to end your life silently like this.... or to become a shinigami who kills "calamities