My Life After Her Death (2004)

Original title: 彼女が死んじゃった

A free-spirited young woman, Yukari, touches those around her with a zest for life, full of passion. Following her unexplained suicide, her envious younger sister, Reiko, and naive fiancé, Yoshio, form an unlikely alliance with the last person to see her alive, playboy- entertainer Hajime. The 3 unlikely comrades must join forces to discover the circumstances surrounding Yukari's sudden death. As Yukari's hidden past is revealed, her secret life promises to shock and surprise those who thought they knew her best.