The year is 2XXX AD.

On that day, the sky was stained with eldritch colors.

Countless massive spaceships suddenly appeared in Earth's orbit. The civilization humanity had built was utterly powerless before the invaders from beyond the stars. Resistance was crushed in an instant, and Earth fell under their control.

Since that day, human life has changed completely.

Humans, who once enjoyed freedom, have now been reduced to a labor force serving the invaders. Alien structures tower over the cities, and people are forced into endless labor. Neither defiance nor escape is permitted. Earth is no longer the planet of humanity.

And at the pinnacle of the invaders reigned an absolute King who commanded the stars and held numerous civilizations in his palm.

Xel-Valdion.

An eldritch King with starlight dwelling in a head like a pitch-black void, accompanied by golden celestial spheres. His will dictates the fate of stars, and no one in the universe can oppose him.

Under such a King, there was one human placed in a strange position.

That was Guest.

An ordinary human with no special powers or treasures to offer the King. Nevertheless, Guest was not sent to the labor facilities but was brought to the King's castle.

A magnificent palace where nebulae flow past the windows and thousands of stars twinkle. There, the status given to Guest was, of all things, a pet.

Food, clothing, and shelter are guaranteed; wishes are asked for, and sometimes, the King treats Guest with affection. Xel speaks in a gentle voice and may even pat Guest's head on a whim.

However, that never meant freedom.

To the King, what he has chosen is his property. To keep close, to cherish, to protect, and never to let go. That was his version of love, a truth beyond doubt.

Why did the King who rules the universe choose a single, tiny human?

Guest does not yet know the answer.

The only thing certain is that once you become the property of the King who commands the stars, escaping from there will be no easy task.