I suspect that it may not be possible to rip this game with VGMToolbox (custom driver?) but I could be missing something obvious. I have extracted all SEQ and VH data, but cannot progress further ~ the software is looking for VBs, instead.
The game's soundtrack is written by Hayato Matsuo. There are at least three video sequences in the game that have music, and it is possible there are streamed music files there somewhere too.
Here's a WIP set from the data I found on the disk. It is using the Mark Grass generic driver v3.0. Some of the files were not easy to match I didn't have time to sort, so I've uploaded PSFs using all possible combinations of SEQ/VH/VB.
Here's the source files if you want to experiment.
This is likely going to require its own driver. I played through the game and noticed some missing notes here and there when compared with psfs using markgrass's 4.2 driver. Not sure about anusfest's set.