I know, it's just a wishful thinking. I was actually qute surprised that game looks that bad - for a japanese devs it is quite rare! And in unity engine too...Adding completely new animations isn't impossible but that'd need a very dedicated developer with good understanding of unity engine as well as knowledge to make decent animations. Chances of such a person stumbling upon this porn game and then deciding to spend their days on doing such things is probably almost zero(unless developer of the game officially supports animation, sprite etc mods).