Ruru-chan seems to go as soon as she uses an electric massage machine. - If you try to do it while lying on your back as usual, you will really come right away. - She seems to be the owner of a rather sensitive chestnut. - Then, what kind of system would make it easier to live? - When you hit it while sitting. - Or when you land on all fours? - Or when you stand up and hit it. - Which pose is the easiest to come to?
