According to Monthly Shounen Ace, Minazuki Suu
's manga "Sora no Otoshimono
" was announced to get an anime adaptation. Sora no Otoshimono has been published in Mothly Shounen Ace since May 2007 and there are four Tankobon
published to date. The type and schedule of airing have not been given yet.
Source: Scan of Shounen Ace