Possible solve
From The Lost Media Wiki
About a year ago, I found the RAR file for this game on some Korean social media forum, and it was most likely on Naver. I uploaded it onto my Google Drive, and a year later, I revisited the file and took a look through it, and it has a bunch of split 7zip files in them, so I'll see if I can extract them soon, and upload it somewhere.
I'm not gonna be that guy who never updates and leaves everyone on a mysterious cliffhanger, so expect an update about this soon.
EDIT: After waiting a while, I emailed the original person who seems to be behind the page that uploaded the RAR file that I have, and still have not got a response since June 26th, but I may be able to find another way to open the file.