This mod is for Ineffa's little robot summoned by her skill.
Well... I'm told that this is actually a circular saw, not a chainsaw. But there is only a chainsaw tag on pixiv, so I'll just let it be.
Key control: alt+p to pause. "]" to reset animation. "q" to temporarily disable the mod (for 2 seconds), because it has some conflict with her burst cut in.
Public version contains a 150 frame animation loop (around 5 second). Full version has a 1000 frame animation, as the preview below shows.
v6.0 update: Place the file "IneffaSkill_RemoveHat.ini" in the mod folder will remove the little hat it gets from Ineffa's toobox.
IneffaSkill - Silicon Chainsaw (public)
ps: A small bug i made in the process. i assigned the model to a wrong vertex group, but i find the result interesting.