The "pc" indicates it is designed for desktop operating systems, typically Windows.
If you can share where you found this file, I might be able to find: The Patch notes or system requirements Content warnings or story synopses SexNote-0.19.0a-pc.zip
Always scan downloaded .zip files from independent sources with reputable antivirus software before extracting and running them to ensure safety. The "pc" indicates it is designed for desktop