Olfactogram (2002)

Amateur band guitarist Minoru Katagiri (Mizuho Takasugi) becomes unconscious when someone hits his head at her sister's house. Minoru, who regained consciousness a month later, learns that her sister was killed as a victim of a series of bizarre murders that day. In addition, his sense of smell developed abnormally due to the aftereffects of being beaten, and he acquired a special ability to visualize odors. Minoru pursues the criminal by making full use of this special ability.