Tsutomu Wakui

The daughter of a wealthy family goes missing at the same time a mysterious dwarf is running around town scattering body parts in public areas.

Tamio takes Itsuko to an art gallery and the two find one painting is a nude portrait of Itsuko's mother, who disappeared twenty years ago when she was just a baby. No one knows the first thing about the artist who painted it, but he goes by the name Shiro Sofue, and he's always wearing shades in the daytime...