Tsukiyo no Toratsugumi

Two children come across a house in the forest. Inside lives a witch - at least, according to the other children. She's rumored to be storing a thousand cat corpses and is capable of kidnapping and using magic, and they can't look upon her. That is, until she returns to the house with a smile and invites them in! Once inside the two children learn about the old woman and realize that things aren't always as they seem...