It's an '80s OVA about an android who can love.
Synopsis: "Dr. Watson has created his masterpiece – a beautiful woman made of metal. A wonder of science, Antoinette is a childlike innocent who holds the key to an ancient civilization that could save the world, or destroy it. And when a mad tyrant kidnaps the man she loves, Antoinette finally discovers the courage – and the amazing fighting skills – that are her true calling."
The synopsis is... generous to the series, which does a piss poor job of actually establishing the alleged romantic interest, among other things.