Hah.... Thank you very much, bkirch-san!!
He teach me about photoshop tool,
and I can make piston animation easy!!
and I don't even need to copy layers!!!
Many problems have been solved. X3
The GIF sample is irrumatio scene.
The piston action is dynamic!!
Hm... I love the way she is suffering....?
I can't make many scenes this time,
but, I'll focus on the new attempt.
Please wait!!! XD