Thanks for the answer.I don't know anything about the mod but it looks like they are using the MMDD mod for HS2 to make it easier for this type of animation. The very poorly translated description reads:
"Even though it was a great motion, reading it with a honeysuckle would cause the joints to become strange, so I had a hard time fixing it. Fix it with MMD → Load it with Hanisele and check it for 11 people is tiring. So there are still some strange things, but I'm compromising. I think you should just look at the boobs for now!"
I have tried to download the 68 GB zip-file version of the game now and had some initial trials and look-up in this thread. Dances seems to be made in the studio part of the game with a separate exe-file to launch. There seems to be a manual for this studio in the manual_s folder, but it is only in Japan language and not English. Have you seen an English version of this studio manual?
Furthermore the screen shown by the install program InitSettings is not the same as documented in the manual, and therefore it is a bit difficult to find out what you need to do here.
I have got an issue with a graphics card not meeting specifications (it have got 1 GB ram and screen is 1920 x 1200 pixels). The game do run, but you got screen motion updated each second or so, and it is quite bad. Might try to change some settings to improve or buy a new graphics card for my stationary PC.