In 2003, Jun starred in physiological thriller film, The Uninvited which was rather well received by critics but failed to catch on with viewers. Throughout this time she was a constant presence in TV ads and on billboards in Korea and also in other Asian countries. She reunited with Kwak Jae-yong, the director of My Sassy Girl in 2004, appearing as a policewoman in romantic comedy Windstruck. However, viewers felt her role was too similar to My Sassy Girl. There were also signs that her popularity had started to suffer because of overexposure in advertisements. Nonetheless, Windstruck became the best-performing Korean film in Japan at the time, where My Sassy Girl was not as well known. In a 2005 survey of influential movie producers, she was ranked among the top ten most bankable stars in Korea.