In face of human technological advancement during the Meiji Restoration, the youkai of Japan were forced to make a hard decision.
While there were some that chose otherwise, the majority of the youkai decided it was best to become human. It was tough, but as time passed these youkai were able to blend in with the human world and live peacefully amongst them.
1. Run Aya.bat and when asked, type Y and press enter. This program is registry key adder. Thanks to Zakamutt!
If you want to move the game folder after running the .bat file, you'll have to run it again or the game will not start.
2. Start ayakasi.exe and play