Office Romance / Mechiku

 The main character of the hentai, Ono-kun, after graduating from university, gets a job in a huge prestigious company and ends up in the most difficult department. He is not afraid of any work that would not interfere with his sex life with his girlfriend. Ono is sure that he can handle everything he takes on, including climbing the career ladder and satisfying his girlfriend's sexual appetites. His girlfriend Ray-chan is satisfied both sexually and morally, because her boyfriend works so hard for the two of them. But soon she will be consumed by a strange feeling of distrust and jealousy towards Ono's boss, Sugiyama-san. Sugiyama is a talented, beautiful, and incredibly intelligent middle-aged woman with a damn attractive body that even Ray cannot compete with. Of course, Ono-kun assures his girlfriend that there is nothing between him and the boss, but is he really honest?