【The Serious-Looking Woman is Actually the Most Erotic!】In a quiet office with just me and the administrative staff member Yamagishi-san. I thought she was not my type, but we hit it off over something trivial! After work, we secretly drank in the office... Her eyes changed suddenly and she kissed me, and then we had raw sex right there in the office! Who would have thought Yamagishi-san was this lewd... Until the other employees arrive, I have to keep up with the insatiable sexual appetite of Yamagishi-san and keep our office affair a secret from my wife, having multiple rounds!