The elevator in my company is unusual. What makes it different is that pressing the buttons is decided by turns. For men, it's just pressing the button normally. But for women, it's a bit different; the woman on duty wears a T-back and office lady attire. That alone is already erotic, but that's not all. Let's try riding it. When you tell her the floor number, she says, "Slap my butt!" It's a too obscene system. I did as told and slapped her butt. While I was doing it, she let out sounds like "Ah! Ahh!!" A ping sound was heard. Since there was still time, I repeated it several times. It must have been about 20 minutes. She was breathing heavily. "Tell me the floor number..." she said in a thin voice. After I finished telling her, she suddenly took off her panties and started demanding that I thrust for the number of floors. She seemed to have reached her limit. I did as she demanded, inserted my penis into her, and thrust for the number of floors. Her juices overflowed and spurted out. "No! More!" Her demands didn't stop. When I moved my hips, she moaned and her breasts swayed. Seeing her, with a model-like proportion, excited me so much that my hips moved on their own. Maybe because I moved too much, the elevator stopped. Then, I spent the night with her.