Damn, things are heating up.
I think I understand the premise of what's going on in this anime between the Killing Goods and Authors. Every Author that has a Killing Good ends up having to kill someone to prevent their spirit from being eaten, but some manage to trick their Killing Good. Kiri tricks his by cutting the hair of Iwai and Yamane tricks hers by injecting his twin sister and pretending to kill her, in the end though the Killing Goods are meant to be used an a murder tool.
If I get that right, it seems like a pretty interesting plot
I did sorta think the whole lcking the sisters wounds thing seemed a little, er, weird, but who am I to judge XD
Next episode should be interesting with new Author and Killing Tool being introduced. Loving the music and animation also, very nice