Haiyore! Nyaruko-san (這いよれ! ニャル子さん) written by Aisora Manta (逢空 万太). The anime tells the story of a young boy named Yasaka, Mahiro (八坂 真尋), who was hunted by aliens one night and he was helped by a little girl named Nyaruko (ニャル子).
Haiyore! Nyaruko-san is a light novel published in GA Bunko (GA文庫) since April 2009, and illustrations by Koin. Haiyore! Nyaruko-san had been created into a flash animation called Haiyoru! Nyaruani (這いよる！ニャルアニ), which comes with the special light novel vol.4 before becoming a full anime.