After seeing the entire series, you all owe it to yourself to go back and watch the earlier episodes again. Ep.2 especially. You'll see Kage-Yuuko touch Teichi from the shadows when he gets his 1st flashback on what happened. The ending credits are interesting as well as you'll see in Ep.2 there's no moon in the end credits sequence. I believe it changes every episode. Especially in Ep.7 where they totally take Yuuko's character out of the end credits completely (for obvious reasons).