Black Cat is a manga about a sweeper(bounty hunter) named Train Heartnet, his partner Sven Vollfied, and Eve, the 'Little Princess'.
Train is an ex-member of an organization called Chronos, and all they really tell you about Chronos is that it is big and powerful and secret. Anyway. Black Cat is the story of Train and his companions as they go to defeat Train's ex-partner Creed, who wants to be god(where have we seen that before?).
Along the journey, Train and his companions meet new people, reveal their pasts, and get some nice, lovely character development.
It's kind of cheesy in its theme, but Black Cat reminds me of a bunch of awesome manga/anime/video games.
It seems like a combination of:
Tales of Symphonia
Alive - The Final Evolution
And a bunch more that I had in my head while reading the manga but have now forgotten. Trigun and Cowboy Bebop the most, though. Train even has his own Rem, though her name is Saya and she's more of a love interest.
I rank this story 9.5 out of 10.
I'm tired of the asterisks thing, they are useless.
On to Black God(or Kuro Kami)!