Apocalypse Hunter System

My name is Yang Yu. I'm nineteen years old, just an ordinary young man. It felt like a dream: a zombie virus suddenly broke out. My parents gave their lives so that my little sister and I could survive... After barely escaping the zombies, we fell into the hands of evil men, who attacked me relentlessly with electric batons... By a stroke of fate, a powerful electric current activated a System in my mind, and the crisis I faced grew more serious by the day...