Zombies: Civilization

Human Era

Year 4589

Blue Star

The Imperial Interstellar Expeditionary Force headquarters suddenly received a strange message from an unknown source.

It was clearly sent by a more advanced civilization.

It read:

Blue Star, I... have returned.

That same year,

countless interstellar fleets emerged slowly from spatial wormholes.

Landing on Blue Star

Thud thud thud thud

Countless zombie soldiers in heavy combat suits marched out of the fleets in orderly ranks.

For a time, everyone on Blue Star was gripped by fear.

A handsome man wearing an imperial robe strode through the air aboard the fleet's largest command ship. Before he could speak,

the skies over Blue Star suddenly filled with dark clouds. A hundred thousand heavenly soldiers and generals stood atop them, facing a shadow clad in a golden dragon imperial robe. The shadow's voice rang out across the world:

I, the Emperor, have answered the summons.

The handsome young man gazed on with amusement, thinking to himself that the myths had been real after all.

This is

Blue Star…

The Ancient Heavenly Court

[In the early part, it is the Starfall Empire; midway through, it is renamed the Eternal Heavenly Kingdom.]

The protagonist is the one wearing the imperial robe (๑❛ᴗ❛๑)

The synopsis doesn't do it justice. Please read the story.