Nobody talks about this one. A single episode where animation and electronic music collide so hard that you forget you're watching a music video at all, the visuals don't serve the song, they ARE the song. By the end you're watching characters move through a fever dream that only makes sense if you stop thinking about plot and let the rhythm do the thinking for you.
Cafe de Oni is a one-episode animated music video made for Denki Groove's song of the same name. The animation is set to the track itself, so it plays as a companion piece to the music rather than as a standalone story, and fans of the band will likely want to seek it out.