Bully the Old Man? One Punch and You're Done!

Terminal diagnosis. Zombie apocalypse. And Chi Yufei just woke up as a 70-year-old man. Armed with the "Vibrant Old Man System," he's running a general store in the wasteland—except his mercenary service makes him invincible (but somehow he still can't win?), his pig bodyguard wields a cleaver, and his rooster... cooks gourmet meals. Everyone underestimates the elderly until this grandpa throws a punch. In a world where the dead walk and survival is brutal, being old just became the ultimate power move.