Zoku Kairaku Izonshou ~Sonogo no Ryouko-san~

It focuses yet again on our OL Ryoko and her amazing pension of finding younger men with big cocks. She dumped the previous boy a year ago, and now is focusing her efforts on work. However it isn’t long until this nymphomaniac starts aching for the cock again. Luckily, she meets a private school student on a train to/from work. Using her feminine charms she begins courting the fellow as her new pet.

[From White Masq]