Metropolis: My Future Self Wants Me to Save the World?

Xu Tian looked at the man in front of him who looked almost exactly like himself and asked: "Are you really me from the future? How do you make me trust you?" "When you were three years old, you peeped on the sister next door taking a bath and fell into the pit because of your guilty conscience! When you were six years old, you followed a female high school student and you were beaten! When you were nine years old, your mother almost gave you the reward..." "What is your purpose?" "Fifteen years later, disaster strikes, and I want you to save the world!" "Fuck! Get out! I'm not a saint! Save a der! Now I'm so poor! Why doesn't anyone come to save me?" "It's called the system. If you change your mind, just press the button and it will help you!" My future self left a black ball! Then disappeared! I looked at my parents who loved me deeply and my younger brother who had never seen the prosperity of the world! I relented! Button pressed! What happens when the button is pressed? Why am I still alive in the future? What kind of disaster will annihilate mankind around the world? Can I complete my mission to save the world? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.