Full-Time Killer

My name is Feng, and I am a killer. Many people call me Death, but I prefer the name Madman. The life of a killer is difficult. Apart from killing people, how much life can I have left? So, after becoming a gold medal killer, I decided to change my own killing plan! Enjoy life while you're on a mission. What is life? Life is not just about running around and working hard. For me, enjoyment is life! ... Even though I can enjoy life while performing missions, I decided to quit the killer group. Who would want to be a murderer if they could? However, the last task before quitting completely changed my destiny! Is this last mission a conspiracy against me, or is it just a simple mission? Or maybe someone wants to get rid of me and ask me to help him complete this task?