Made a playlist dedicated to hikikomorism - mostly songs that match the vibe of isolation and solitude that typically comes with being a hikikomori/NEET - if anyone is interested.
You'll need Spotify in order to listen to it, though.
Even though I made this playlist a couple of months ago, I figured it'd be good for forum members who participate in this thread to listen to if they want to feel that "isolated" vibe (which I did my best to capture with the songs in the playlist).
Enjoy.