Apocalypse Harem Upgrade: My Queens Go SSS

After transmigrating into a post-apocalyptic world, Evan York activates the Devoted Wife System on the eve of his death. To everyone’s shock, he chooses three outcast women labeled as failures. But after injecting them with a mysterious serum, all three women become incredibly powerful in their own right. As his three S-rank wives dominate every enemy, Evan rises against the one who rules Bastion and carves a bloody path to power.