According to Kadokawa Shoten, manga "Hozuki-san Chi no Aneki
" was announced to get an anime adaptation. The manga had been serialized in Young Ace magazine from July 2009 - June 2011. Its side story manga "Hozuki-san Chi no Aneki: Nano Branch
" has been published in 4 Coma Nano Ace since March 2011.
Source: Scan of the announcement