Ragitsu almost 11 years ago This is a duplicate. http://danbooru.me/post/show/69849/2girls-fine_art_parody-l-amour_de_pierrot-oekaki-o
piespy almost 11 years ago This is better quality though.But putting "pixiv" as source is quite useless.
Yoritoshi over 8 years ago I remember seeing this trick for the first time in the Space Adventure Cobra manga (post #69850). In fact, the tags for this picture in Pixiv reference Cobra.