Asked by SEEDERY, here is a youtube video for confirmation i recorded.

The game is in japanese. You can google an english patch if you need one.

game’s official website

Installation

1. Mount the iso and run setup.exe.
2. If there’s japanese text inside the default install directory adress showing like “???” change it to “星空へ架かる橋”.
3. Install .exe updates located inside “Update 1.01” and “Valentine patch” folders. The game’s path is detected automatically.
4. The iso is not needed to start the game.
   Please seed. It’s the only way for the game to remain alive on the internet. it’s becoming increasingly hard to find this game.

CG