 If you liked
Black Cat
|
 ...then you might like
Number
|
Assassins, part of an organisation called Number(s). The main character appears to have a vendetta against a current / ex-colleague. Each assassin within the organisation appears to have their own specific skills and abilities. The main characters also appear to use guns as their main arsenal. Plots are different from the start, but these similar elements may lead one to like one and the other.