Rei is an international flight attendant who travels around the world. She met her husband, who works for an import trading company, on an airplane and got married to him. That day, the flight to Los Angeles was just like any other... However, Rei happened to meet her husband's colleague, Sawachi, on the plane, and due to fatigue and loneliness, she made a mistake and spent the night with him. It was only supposed to be a one-time thing, but as soon as she returned to Japan, Sawachi invited her husband and Rei to his house, and the two were reunited. Although she felt guilty, she became addicted to pleasure with Sawachi. And then...