Train Heartnet, also known as "Black Cat," was an infamous assassin for a secret organization called Chronos... until he abandoned that cold-blooded existence to live on his own terms as an easygoing bounty hunter. But is Train's past as far behind him as he thinks?

Link:
[url=https://www.animenewsnetwork.com/encyclopedia/anime.php?id=5245]AnimeNewsNetwork[/url] (anime)