The Adventures of Kotetsu

While walking the streets of Tokyo, Linn Suzuki spots a strange device sticking up from the sidewalk. All at once she is attacked by thugs and saved by a beautiful stranger who takes them all down. It turns out young Linn has fled Deep Kyoto from her cruel mistress and come to Edo hoping to find her long lost brother, last seen working for the Kuon Detective Agency. As it happens, the stranger is Miho Kuon, who lets Linn stay with her and nicknames her Kotetsu, or Little Tetsu, after her brother Tetsujin. But a mysterious agency called the Syndicate is after Miho, and Linn is now right in the middle of it.