BOYS OVER FLOWERS the movie

Four years after the prom where Tsukasa Dōmyōji (Jun Matsumoto) proposed to Tsukushi Makino (Mao Inoue) in front of everyone, the two families sit down to an engagement dinner. Dōmyōji's mother, who has fought the match from the start, hands Tsukushi a tiara worth roughly 10 billion yen, and that same night it is stolen. Yasuharu Ishii sends the couple after it through Las Vegas, Hong Kong and a deserted island, with Tsukushi dragged along as stubbornly as ever.