After millennia of time, human civilization has experienced several cycles of rise and fall. However, never before has there been such a stark contrast between prosperity and decline.

In the year 3487 AD, humans possessed advanced super-technological capabilities that surpassed the imagination of their time. They colonized the entire Milky Way galaxy with their unmatched vitality and insatiable ambition, expanding their territory to a size never seen before - a diameter of 200 million light-years known as the Osaka Map.

However, their relentless expansion finally angered other species in the Milky Way galaxy. Thus, a colossal interstellar war involving trillions of races broke out on February 15th, 3487 AD.

With their superior technology and one-quarter of the total population of intelligent life in the galaxy, humans initially had the upper hand. But after enduring a galactic war that lasted for 3,000 years, they eventually succumbed to the combined forces of the entire Milky Way.

In the end, losing 99.99% of their remaining population, the remaining few billion humans gathered in their home solar system. Devoid of all their star wars weaponry, the Chief of the Human Alliance made a fateful decision. They detonated a man-made wormhole bomb made from digging out Pluto, creating a black hole the size of a sun that only lasted for one second. Instantly, it destroyed the alien alliance fleet numbering in the trillions, assembled outside the solar system.

But the cost was immense - humanity lost 9.5 billion of the remaining 10 billion people, Earth was left in ruins, and a high-energy electromagnetic storm swept across the entire Milky Way, rendering all electronic instruments in every corner of the galaxy useless as long as the electromagnetic storm persisted.

In just one second, the civilization of the Milky Way regressed by millions of years, and the once bustling universe became eerily quiet. Each planet developed its own culture as an isolated unit, waiting patiently for the next moment to soar through the cosmos again.

This is the story of a human known as the "Tianmo Shen" - a legendary figure in an era filled with heroes, demons, fairies, and demi-humans, set in a distant era long after the rise and fall of human civilization.