"If you have complaints, I'd like you to protest Mary's mama (the author of the character)"
After she told me and declined she was ...
It is software called facerig that activates the character of the Virtual YouTuber.
With the function of that software, can move parts of the body, and her left hand moves up and down.
She showed off her handjob in vulgar using that function.
The audience got so excited and the fun movie was over.