https://www.dlsite.com/maniax/work/=/product_id/RJ349440.html Game doesn't work. I suspect you might need to change your locale to Japan, I remember having a similar problem when I tried a different Unity game. Locale emulators don't work with Unity.

The game works properly and your assumption about locale is probably correct too but I still don't know why people still stubbornly refuse to change it if they are using Japanese software so much.