More Children, More Blessings: It Begins with a White Zetsu Zombie Outbreak in Naruto

[White Zetsu apocalypse + Naruto + more children, more blessings + tons of beautiful women + tons of classic characters + stockpiling + survival + ranks]

The protagonist, Hao Qiang, transmigrates from a parallel world into the Naruto world, only to encounter a White Zetsu outbreak. White Zetsu armies descend across the globe, inflicting devastating damage on the entire Naruto world.

After transmigrating into the Naruto world, Hao Qiang becomes a genuinely powerful man and binds himself to a more children, more blessings System. As long as he has children and contributes to humanity's continued existence, he can earn rewards.

And so, he takes on the responsibility of saving all of humanity.