I posted this on the first in the series too, but the artist made this app with the girl from this series https://play.google.com/store/apps/details?id=com.unity3d.saruru It's just a sort of "touch and watch her do cute things" app.
Pfft, anyone who has used an actual Hitachi for 2 hours knows that's how you get serious genital burns.
...eventually the plastic casing melts and warps and then the spring driving the head detaches. It's pretty serious, just fyi. Oh and you can get shocked when internal parts get out of alignment and suddenly the metal top ring becomes conductive. It's really not fun.