Demon Slayer Era: The Strongest Blade

By 2250, humanity had long since entered the age of interstellar civilization.

Yet in this era of highly advanced technology, an extremely ancient form of cultivation had begun to flourish.

It was called the Breathing Style.

At the same time, to ease population pressure, the Interstellar Government terraformed planets throughout the solar system and sent people to colonize them. But over time, these colonists gradually slipped out of the Earth's government control and began to grow restless.

And during this period, large numbers of creatures known as “demons” began appearing among humanity!

They fed on people.

The more people they ate, the stronger they became, and their numbers continued to grow.

Humanity fought back, combining combat techniques derived from Breathing Styles with mysterious sun ore unearthed from the ground to create a demon-slaying alliance spanning multiple star systems.

And so the Demon Slayer Era officially began...

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.