On the train on my way to work. A plump married woman. As I watched, a group of men surrounded her and started touching her while exchanging glances. When we arrived at the station, she staggered out of the train. Curious, I followed her. She seemed to be a librarian. As I was browsing through books in a place where I could get a sneak peek at her, a man who seemed to be her boss appeared and said something. She apologized, and the man took her to another room. I followed behind again secretly. When the man exposed his lower body, she began to suck his genitals. When it was over, I hurried to the bookshelf. After a while, she looked at me and smiled. "Hey, you were looking at it just now, weren't you..."