Well, usually there's a download button on the audio page, but what to do if direct downloads are not allowed by the creator even though you love this song too much?

You just use this.

You can also read the Russian README or Japanese README.

• 
• PyQt5 library
• requests library
• bs4 library
• click library

Or you just use the .exe file from NGAudioDownloader.zip so all you need is .

You just download NGAudioDownloader.zip, extract it somewhere and run the NGAudioDownloader.exe.

※NOTE: if you want this downloader working correctly DO NOT move/delete any files extracted from the archive!

You just download the whole repository and run NGAudioDownloader.py. That's all. :3

It's easy as pie. You just run the downloader, enter your song ID and your file is being downloaded!

• Enter starts download
• Alt + S calls settings dialog
• F1 calls help

Well, pythonists are considered already understanding how it all works, so here's the video guide for civilians.