According to the official twitter, a TV anime of Aisora Manta's light novel "Haiyore! Nyaruko-san" was announced. A flash OVA series "Haiyoru! Nyaru-ani
" has already been released since 2009. The details of the TV series will be revealed in the light novel volume 5 to be released on August 15th.
Source: Haiyore Nyaruko official twitter