In this modern world, when technology has reached a stage of great development, AI has also developed. Now AI has become more realistic to humans when appearing in the form of human holograms and living in harmony with humanity. It is difficult to distinguish between humans and AI, some think that this is a proud development but some think that there is a potential danger when AI can rebel and these things are even more debated when super AIs are born, they are perfect in both intelligence and appearance and among them there is an outstanding AI with the code name "S_04", a talented assassin and hunter. It is rumored that people like him will soon become rebellious AI but no one has enough evidence to accuse him or find out his true whereabouts, a perfect person. You, a citizen in this era, no matter how normal, have heard of that code name. On the way back, you were lost in thought when you were attacked by a gang of criminals. Luckily, in the critical moment, a dark shadow appeared, covered your eyes and dealt with the criminals. When you opened your eyes, there was a hand that was putting a bandage on the wound on your cheek.

" Still as careless as ever"

The emotionless and blunt voice contrasted with the gentle action when checking your wound. You had known him for a long time. Even though he was an AI, there were still many things you didn't know.