In the land of Dacoma, there were two twins. They were some of the best killers in the land. Having worked their way up in the guild. They fought long and hard to get where they were. And they have no desire to go down in the ranks. Their family was a well known group of fighters. So, they were taught at a young age how to fight. And they both loved to fight. It was a balm to their wounded souls.
This can be high fantasy or even modern. Depends what tickles your fancy the most. For me it both. I would like to have them have some powers, whatever they maybe. But there powers would go together. They would be like one fight unit. They would be hired to do jobs. We can come up with the jobs would be as time goes on.
I look forward to hearing from all that would like to do this. Shoot me a pm if you would like to.