Thanks for the lead. I shot them an email asking since it's a lot of videos to go through. Hopefuly I find something
I've combed through maybe 100 already and nothing yet, though the band Haujobb has a couple tracks that sound like they're in the ballpark, but not quite.
Something else I should probably mention is that the site is a fan archive of information from the Tsuki Project website, a Serial Experiments Lain inspired ARG.
(This is a backup of the site, as it went down upon the ARG's conclusion, hence the need for Sanya to make her own archive)
Systemspace archive
systemspace.dimden.dev
Based on her post history on lewd, and that there's literally a picture of Lain on the site, its should come as no surprise that Sanya was a Lain fan.
Anyway, on the site's musicbox has an option under "Error Pages" called "404," a track from producer Drax, who is linked in the lewd post and has several tracks on soundwave's channel.
All this is to say there's a very solid connection between all of this, so I'm optimistic that the track may be sourced from soundwave.
Also, a reply to the lewd post from a friend of Sanya's links to a compilation album featuring a song of hers, under the name Fighting Fire With Gasoline. The Discogs page for that name only has two tracks, neither of which quite fit the vibe of our mystery track, though they were likely still inspired by the same kind of music put out on soundwave.
Fight Fire With Gasoline Discography at Discogs
www.discogs.com
View: https://suimoe.bandcamp.com/track/senkaji
View: https://jujufrootcoop.bandcamp.com/track/fight-fire-with-gasoline-cologne-i-can-see-the-sky