Demon Slayer: The Apocalypse Has Arrived, and I've Unlocked Every Breathing Style!

It's 2024, two years after the island nation dumped nuclear wastewater into the sea.

Xia Jianghe, a member of the Demon Hunting Organization, is ambushed and killed by his teammates. By chance, he awakens a System and enters a cultivation dreamscape. After five years, he unlocks every Breathing Style and returns to the real world.

But this time, when he wakes up, he discovers a first-class demon that shouldn't exist within ten thousand meters of the survivor zone. He also runs into his friend Tianyou, who had died...

Gradually, he realizes that the human mutations caused by the nuclear wastewater weren't a mere accident. Someone was pulling strings behind the scenes.

After Xia Jianghe resolves the crisis and believes he has saved the world, another fog of mystery descends upon him...