[Guido]

When Misaki thoroughly explained Kouichi about she being able to see the color of death with her glass eye I thought of some examples.

The first was D.Gray-man with Allen's left eye able to tell humans and Akuma apart, but then I thought of other shows with more sinisters themes. One of them is Tsukihime; Shiki Tohno's ability to see the lines of death with his eyes.

I think it was in episode four that Misaki explained to Kouichi that when little she had developed a sort of cancerous growth around the area of her left eye and had to be surgically removed.
I theorize maybe Misaki got blessed/cursed with the glass eye able to see the color of death, because she experienced a close encounter with death in that surgery. It's just a theory nothing else.

But the thing is that with the eye and after listening to the tape she confirmed for real the identity of the year's extra person; the dead one, and why she was looking anxious.

From the preview, it looks that the story will reach the climax next episode.