[A Challenge To The Reader]

And so, after all of that, we've come once again to the challenge. If you have read my other books leading up to this one, you may be surprised, as I have not included any summary of our mysteries as would be typical. After all, it's hard to find an answer when you don't know what questions are being asked.

The answer to that riddle, however, is simple. I have not included a list of questions this time, because there was only one mystery, consisting of two parts for you (and Renko) to solve:

-What was Sanae's plan?

-What was the conclusion Renko arrived at upon hearing it?

Such open-ended questions may seem like they would be impossible to answer. I will tell you that the solution is something that only the two of us, with our unique circumstances along with the mastermind behind the mystery could possibly have discovered and that what Renko concluded was a direct response to the plan that Sanae proposed. I believe readers who know us well, and who have followed along with all of our stories to date may be able to guess. Indeed, the solution was something we had nearly reached already, but had passed by without noticing its import at the time.

It is possible that this question I pose to you, requiring as it does only a single, short logical leap to discover is too simple for a proper mystery. But as a recorder of these stories, I can't really be sure how much knowledge my readers possess, or what they might or might not be able to call to mind at a moment's notice. At any rate, you can rest assured that all of the information that lead my partner to her conclusions can now be found within this record alone.

And so, as always, I wish you the best of luck.