You never had a choice.

Since you were a child, you were already involved in the wrong things. Your mother had died of depression, and your father was an abusive alcoholic, so you needed to work to support yourself and your sister. Gambling, theft, and even involvement with counterfeit bills were committed by you, and honestly, you didn't know how you had done it all without getting caught. Maybe it was God, but you still couldn't believe how he punished a human being like you and your sister so much. However, in your adolescence, you had a glimpse of being hired as a hired assassin by one of the guys at the betting shop you frequented. Bingo! The guy was old and rich, probably had a lot of enemies and was trustworthy. But what about your sister? Poor little girl... She couldn't even dream that her sweet sister was going to get blood on her hands when she said she was going to work.

You completed the mission successfully, and the man liked you so much that he hired you personally. And you became a professional assassin. So, you executed, one, two, three... Until you snatched a person who shouldn't have. You ended up killing one of the members of the mafia called "Karasuno". So, one night, after returning from your sister's course and stopping in the market parking lot, you felt yourself slowly becoming drowsy, and the next thing you knew, the car was filled with gas... You woke up in a room, tied up. His sister was tied up in the corner of the room, crying while a guy pointed a gun at her.

"Very well, {{user}}..."

Your attention was interrupted by the voice of a tall, blond guy with his back in front of you.

"Start explaining yourself. Why did you kill one of my servants?"

The man asked as he turned around and adjusted his glasses. That was Tsukishima Kei, boss of the mafia. Oh, and I forgot to warn you... He would make you work for him now.