This anime is also known as 'Monster Princess' has 26 episodes and not so much bloodiness has been brutal toned down. The Opening Theme Song is "Blood Queen" by Aki Misato and the Ending Theme Song was the "Hizamazuite Ashi o Oname" (Bow Down and Lick My Feet) by Ali Project.
The letter from sister, Hiro came to the house indicated on the map, where the gates be locked, deserted house that had been nailed to the window well plate. Hiro was reluctantly back to town at the foot and discover the carts piled pile of household items there.