Unwanted riddle

You're in the restricted area of the historic library at midnight, digging up every pages searching for the clue of the mystery that you've taken up. Whatever you do, make it fast because the suspiciously weird librarian doesn't seem welcoming.

Once downloaded you are free to use this asset under the CC_BY term.

This license enables reusers to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. The license allows for commercial use. CC BY includes the following elements:

 BY: credit must be given to the creator.

Please refer to me as 東月 or Dongnguyet in your credit

The asset file comes in .mp3 format. If you would like to have it in other file format (.wav, .MIDI, .mscz, .pdf...) please contact me via email:  dongnguyet.dev@gmail.com