Caí numa ilha deserta e todo mês o Sistema me teletransporta uma garota

He died in a nuclear reactor and woke up on an island. Naked. Without resources. Surrounded by three hostile tribes. But he had a system. And the knowledge of a physicist, an engineer, and a strategist. The first metal. The first ally. The first war. And every month a new girl falls from the sky: a military surgeon, an agronomist… who will be next? A manhwa about how a single man builds a civilization from scratch while everyone thinks he's just an outsider without a tribe.