Early '90s anime synth with that specific OVA atmosphere, moody and cinematic on a budget. 3x3 Eyes Chapter 1 scores the first part of the supernatural horror series and it sounds exactly like 1991 felt. "Pai ~Bojou~" carries this longing, melancholic melody that sticks with you, strings and synth layered into something genuinely emotional.
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"Majuu Shuurai" drops into darker territory, all tension and dread when the demons show up. Then "Aoi Tsuki no Shita de" pulls back to something quieter under a blue moon. '91 OVA soundtracks had this way of doing a lot with limited tools.
Drum machines and synth pads doing the work of a full score. Perfect late-night listening if you grew up renting anime VHS tapes and never quite moved on.