The story centers around Nyaruko, a formless Cthulhu deity of Chaos (Nyarlathotep) who can take on the shape of a seemingly ordinary silver-haired girl. Mahiro Yasaka is a normal high school boy who is being chased by a fearsome black alien one night, until Nyaruko saves him. She explains that the creatures from H. P. Lovecraft’s works are actually races of aliens, and that she has been sent to Ea to protect him.
