*The Age of Planetary has arrived！

And this is story of a legendary assassin.

After the end of the Earth era, humanity entered the period of great migration.

The United Nations was reorganized into the Interstellar Alliance, and most countries gradually disbanded.

Extraterrestrial space exploration and migration were becoming more and more popular.

Among them, all kinds of killer organizations start to rise from the ash of history. But none of them can be called

the Assassins.

Until that early morning, the mysterious visitor quietly left the "Plain Field Village." No one noticed his departure, just as no one noticed his arrival. However, when he left, the child on his back had already disappeared...