Recently this month i believe a new anime has started called Owari no Seraph ( which means in English Seraph of the end, i think). the plot is a years ago, a virus spreads across the world killing humanity and allowing "vampire" race to enslave the human race and use humans as a food source. From there, Yūichirō Hyakuya a survivor from the Vampire "base" wants revenge... thats it with out spoiling it to much XD.
In general its a great anime and i suggest watching it... ^_^
