All Humans Shrink 100x — But I Built a Tiny Army First

Earth reboots. Overnight, every human shrinks to palm-size. Insects become monsters, birds become predators, mammals roam like dinosaurs — humanity falls from top of the food chain to the very bottom. Gu Chen is reborn one month before the disaster. He sells his house and shops, drops over two million on custom micro-gear: micro-shelter, micro-helicopter, micro-off-roader, micro-tank, micro-armor, micro-guns, micro-swords and shields — all aluminum alloy, all fully functional. His ex-wife betrayed and butchered him in his past life. This time? No mercy. No harem. No spaceships or fighter jets. Just a pile of palm-sized tanks and choppers, a soulmate Xia Zihan willing to chip in 200,000, and a pinky-swear doomsday countdown.