Metropolis: with a God-Level Computer, I Am Invincible

(Invincible + cool + brainless + cautious) One day, a countdown appeared on Xiao Xun's wrist. As the countdown progressed, his physical condition began to decline precipitously. But just when he needed company, his girlfriend of three years broke up with him. The fiancée who suddenly appeared broke off the engagement to him in public and expressed her disdain for his family background. What happens when the countdown on your wrist clears?