Translation by pickedaxe on Twitter. They allowed me to share the subtitles file, which I've uploaded to 4shared for better privacy.
Do note that this is timed for the MagicStar-subs torrent of the movie. I'm not sure of the linking etiquette, so please contact me privately on Twitter or Bluesky for a link.
To use this file, you'll need VLC Media Player. Put it in the same folder as your torrent (it will replace the Japanese subs file - simply rename the JP one if you want to keep it), and playing the .mkv file should open it automatically with the subs!
What your folder should look like. I renamed the Japanese subs (Just added JP in front) just in case I ever needed them!
If it doesn't show the subs, just right click anywhere in VLC, then go to Subtitle > Add Subtitle File, and select it.
How to open the "Add Subtitle File" menu.
Choosing the file.