In the year 2203 of the Western calendar, the development of science and technology entered a period of stagnation due to a long period of relative peace.

But an accident suddenly struck, breaking this relative peace.

All over the water blue star, strange dimensional cracks suddenly appeared, and countless monsters walked out of the dimensional cracks and attacked the cities where humans lived.

The human warriors fought back against monsters from different dimensions.

This monster attack is called the "Dimension Beast Attack" event.

2204 Gregorian calendar

After a year of war of resistance, the human warriors paid a terrible price and barely stopped the invasion of the dimensional beasts.

However, in the face of the failure of the locking of the conventional weapons of the old generation after the appearance of the dimensional beast, and the amazing defensive power of the dimensional beast, human beings fell into a hard battle.

2205 Gregorian calendar

Humans have paid a heavy price to successfully annihilate the vast majority of dimensional beasts on the water blue star, but they cannot close the dimensional cracks at all.

In the face of the constant flow of dimensional beasts, humans decided to retreat to major cities.

2206 Gregorian calendar

Most of the small countries on the water blue star were destroyed by dimensional beasts.

In order to survive, human beings have established three major human powers based on the continental plates.

They are: Silla Alliance, Human Renewal Unity, Free Federation

2207 Gregorian calendar

The attacks of dimensional beasts are more active, and human beings are facing the crisis of life and death.

At this time, countless steel giants descended from the sky, repelling the dimensional beasts and sheltering humans.

In the same year, a game called "Machine Warfare" was born and swept the entire Water Blue Star.

2210 Gregorian calendar

The three major countries of mankind, the first batch of giant robots called mobile weapons were born and entered mass production.

2233 Western Calendar

Thirty years have passed since the "Dimensional Beast Attack" incident.

In that infinitely far away, yet incomparably close place.

A soul quietly arrives in this world from the other side of the world, opening a new story...