Fridge Horror: All magic requires a sacrifice. What's Hibiki sacrificing? Although in the beginning it's highly probable that her repeated failures in using magic in the beginning is because that she didn't sacrifice anything yet.
They Wasted a Perfectly Good Plot: All that intrigue about the scientists who experimented on Ahito, the mysterious place Yuushin went to and all that? Never goes anywhere. In fact, after Ahito comes to terms with his past in chapter 24, none of it is ever brought up again.
