The beautiful department head at home doesn't like to wear underwear

Because of being slow, I had to stay late to catch up with the progress. Luckily, my department head helped me complete the work earlier than planned. I then invited her for a drink to thank her. But I forgot the time and missed the last train.

The department head invited me to stay overnight at her house. It is her habit not to wear underwear at home, she seemed to be inviting me. In such a space with only the two of us, I could no longer control my desire...