"I'm Nyarlathotep, the creeping chaos always smiling beside you."

This human-like alien in the guise of a cute silver-haired girl calls herself Nyaruko for short. And so, one by one, the Great Ones from the Cthulhu mythos come to Earth to target Nyaruko and her human friend Mahiro. He is utterly clueless about the true nature of this cosmic conflict and just wants to live in peace though.

Source: ANN

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Other: Haiyoru! Nyaruani
Other: Haiyoru! Nyaruani: Remember My Love(craft-sensei)
Sequel: Haiyore! Nyaruko-san W