On his first day of work for a new company, Oliver is given a warning about his boss by one of the girls in the office. It seems Mr. Bradley's preference is for younger men.
That only gets Oliver's interest though, so when he works late one night and gets an offer of a lift home from the man in question, he jumps at the opportunity. It gets him an invitation for a drink that leads to so much more when the kinky perversions of the older man are unleashed on him.
what a butt plug does. The main character has just had a butt plug in his rectum for about fifteen minutes, but his horny boss is still described as "forcing his butt to open up," and no collapse, clenching, or even winking is mentioned.