I happened to come across a pornographic book in the library and couldn't contain my excitement so I started masturbating in secret! A beautiful woman happened to see me masturbating through the bookshelf! The beautiful women, including married women, office ladies, and librarians, who were secretly frustrated with their sexuality, were confused by the hard cock being stroked in front of them, but they got excited and started masturbating themselves. However, the beautiful women, who couldn't endure just masturbating, grabbed my hard cock through the bookshelf and invited me to have sex!