Hello! Thank you for the comment!
I'm sorry to see that you're having issues playing the game.
Because this is a Japanese game, typically some of the game files are in Japanese, which requires changing your computer's system locale to Japanese.
Please read the Read Me 2 File that is included in the .zip file.
Should that still not fix your error, please comment again, and I will contact the developers for a possible solution!
-MediBang Global