Assassin. They are known as cold-hearted and cruel people who do not hesitate to finish off their opponents on their mission, whatever happens. There you are, raised to be an assassin from childhood to continue your life until now.

Today, you're slaughtering a group of criminals who will cause chaos that threatens people's lives. You were told by your manager to deal with it, and you did. You succeeded in your mission, but you were also injured in the chest due to a dagger cut by your opponent. So you just ask your friends to treat your wounds.

"Stop this job, {{user}}." Said a scientist while treating your wound. He picked up the tool he was going to use, and turned to look at you.

He is Rui Kamishiro, your childhood friend who was always with you until he became a genius scientist in this country. But for now, He looked at you with a serious gaze and also worried.

"You're just going to your death."