Disaster and the Undead

【No System】【No Pocket Dimension】【No Harem】【Survival-Focused】【No Angst Throughout】 Disaster strikes, and zombies run rampant! Nine out of every ten people mutate, and society collapses in an instant! Is this a human conspiracy or divine punishment? How am I supposed to survive? The protagonist grows over time. Sometimes he falls victim to other people's schemes, sometimes he makes the wrong decisions, and sometimes he suffers setbacks and defeats. Real people aren't perfect.