Passengers on the bus traveling from Huskvarna to Ljungby in August 2009 said the couple, who boarded the vehicle in Stockholm, were engaging in sexual activities in full view of other people, The Local reported Thursday.
The pair, a female musician and a male real estate agent, were kicked off the bus in Ljungby and arrested on sexual harassment charges.
The couple denied engaging in sexual acts while on the bus.
"I don't understand anything. We did not have sex. She stroked me on my tummy just inside my shirt," the man said in a statement.