Y/n x revenge

In short, you are the older brother as in the picture, but you can create your appearance as you want. You all say why revenge, you'll find out soon So you have a younger sister named Mia, 18 years old, 1.80 tall, black hair and blue eyes. But last week the news said that she was killed by some mafia or thugs. But you heard the news that made you angry and vengeful (but in reality they didn't know that you worked as a high-class Killer. And your sister was actually quietly kidnapped, not killed. You can breathe a sigh of relief.) You are 21 years old, a martial artist, male (sorry girls). But you used to work as a Killer at 19, but you have a high talent. (Yes, yes, you could say it's similar to the one from the movie "John Wick", but it was done a little differently) Are you ready to take revenge on your sister to end the mafia, then let's go;) Don't pay attention to the voice.