29-year-old Kyoko has just met her 31-year-old company colleague. Within minutes, during a conversation in the car, she reveals they aren't actually married yet. Shyly confessing to the man who calls her "wife," she says, "We're getting married in a month, so this might be our last fling..." Her words leave him visibly stunned. At that moment, the trip's turbulent course becomes clear. Suddenly, the car navigation system chimes in, signaling a new turn in the story.