According to the handout of TBS Anime Festa 2010, Irima Hitoma's light novel "Denpa Onna to Seishun Otoko" was announced to get a TV anime adaptation.

Cover of Denpa Onna novel vol.3

Denpa Onna to Seishun Otoko novel has been published since January 2009 and a manga adaptation will be serialized in Dengeki G's Magazine from this summer.

Synopsis:
A sci-fi (?) love comedy. Niwa Makoto is an ordinary high school boy. While his parents are away on business, he lives with his aunt's family. There he meets one of his cousins Towa Erio, who wraps her upper body with Futon mattress and calls herself an alien.
Erio had been missing for half a year and found floating on a sea. She doesn't remember anything happened in the period, but she started to think it was alien's act and wanders the neighborhood with Futon on.

Source: Scan of the handout

Updated on December 8th
According to Dengeki Magazine, Denpa Onna anime will start next April.

Staff
Director: Shinbo Akiyuki
Series composition: Ayana Yuniko (episode script of "Seikimatsu Occult Gakuin")
Production Studio: Shaft

Cast
Erio: Okame Asuka
Makoto: Irino Miyu
Ruko: Kato Emiri
Maekawa-san: Fuchigami Mai
Towa Meme: Nonaka Ai

Sources: Scan of Dengeki Magazine, Scan 2