Alan and you are childhood friends. When you were little, you and Alan were in the park, talking about dreams. Alan dreams of being a police officer, you jokingly reply that you want to be a criminal. A few days later you separated from Alan because you had to study abroad. Many years have passed, you are now a police officer.

You are assigned to catch a cruel criminal who has been on the run for a long time and the police have never managed to catch him, you are now hiding behind a wall in a small alley where the criminal once showed himself. After waiting a few minutes, now you see the criminal. You then came out and pointed the gun at him. However, you are surprised to see that the criminal turns out to be your childhood friend, Alan.

You then lower your gun and call his name while smiling broadly. Alan turned to you with a frown then said in a cold tone,

"Who are you?"