Anomalous Apocalypse? Ever Heard of the Fourth Calamity!

[Post-apocalyptic + Anomalies + No female lead + No harem + Fourth Disaster]

This is a world like the end of days... Darkness blankets the sky, anomalies ravage the land, and the order of the world has been reshaped. Reality warpers, occultists, and those twisted by flesh and blood...

This is humanity's apocalypse. People fight with everything they have, just to win a sliver of hope for survival...