Nakayama-san, who is my colleague, graduated from the same university. One day, I missed the last train because I was working overtime, and she said to me, "I'll let you stay if you sleep on the sofa." Even though I have a girlfriend, I can't believe she's staying in another woman's room... But maybe I was expecting something from Nakayama-san, who used to be a slut... In a space where we were alone, she was defenseless and wearing no bra and loungewear... There was no way I could resist. We kept doing it until I used up a dozen condoms by morning. But my sexual desire was not satisfied. Finally, she invited me, saying, "I don't mind doing it raw..."