There is a patch available, but it has to be purchased. It can be bought from the developers website, or through DLsite.
Run the patcher provided by Denpasoft after purchase, and follow the prompts.
When you go to the Config menu and then the Effect&Sound screen, in the Effects Settings box, there is a "Turn H-Animation On" checkbox.
Patch download: https://denpasoft.com/products/nekopara-vol-2-18-dlc
Steam store: https://store.steampowered.com/app/420110