Yuuka is a married woman who works as a librarian at a library. Ozawa, the president of a certain company, has been frequenting the library for some time and is attracted to Yuuka's hidden charm, as she wears glasses and behaves modestly. One day, Yuuka comes to Ozawa's company for an interview. The reason why Yuuka, who has no experience, applied is because her husband has been cheating on her, and to escape reality... Ozawa sees through this and proposes to hire her as a mistress secretary, taking this once-in-a-lifetime opportunity. Not wanting to let Yuuka's hesitation slip away, Ozawa immediately seizes her lips with his lustful tongue, as if it were his genitals...