Caught up.
I really wonder why this got an English dub since so much is required to know and understand Japanese history to enjoy it. If you didn't know the demons in the show are actually oni, which are different than demons, you would be asking some questions. Since oni were once human, they all have tragic backstories that explain what led to their transformation, and will all likely make you feel sorry for them, since the form they take is a reflection of the sins they grabbed onto in the past life. Why crows? Why are they trying to pick ore? What is the significance of the mask that guy is wearing, and why is he so transfixed on the color red? Then again, a dub for this kind of anime shows respect to the historians who do value Japanese folklore.