Goodbye, Nyarko-san W
The Banshin had been built in a day rather than 500 years, and Nyarko, Kuuko, and Hasuta are ordered to leave Earth as a result because they aren't needed anymore. The group goes to check to see what the Banshin actually is, as it determines if they really do have to leave or not. Will Mahiro have to say goodbye to Nyarko, Kuuko, and Hasuta?
Aired 01/07/2013EP 12 - Goodbye, Nyarko-san W

Nyarko-san: Another Crawling Chaos W
Nyaruko still wants Mahiro, as does Hasta. Cthuko wants Nyaruko, but believes both Nyaruko's and Mahiro's "first time" belongs to her. Mahiro's mother, Yoriko, puts up with all of it and cheerfully runs the house where they all live. Mahiro just wants some sanity. He doesn't want to be the love toy of a Nyarlathotepan, Cthughan, or a shots-like Hasturan. He may or may not hold out.
(Source: Anime News Network, edited)