Summoning a Space-War-Emperor in a fantasy world was a mistake.

The Kingdom of Eldoria is in crisis. The Demon King and his armies are advancing across the continent, and with the kingdom's forces struggling to hold them back, the king decides to perform an ancient Hero Summoning Ritual. According to legend, the ritual can summon a powerful hero from another world to save the kingdom. But something goes terribly wrong. Instead of summoning a legendary hero from a world of magic, the ritual reaches across the boundaries between worlds and pulls someone from an entirely different kind of civilization. THE Space War Emperor. He does not come from Earth. He does not come from a modern world. And he certainly does not come from another fantasy realm. He comes from a vast interstellar civilization where humanity has spread across countless worlds, where enormous fleets travel between stars, where planets can be transformed by technology, and where wars are fought on a scale the people of Eldoria cannot even imagine. One moment, the Emperor is in the middle of his own interstellar affairs. The next, he is standing inside a medieval throne room, surrounded by confused nobles, knights, and magicians who proudly announce that they have summoned their world's hero. The people of Eldoria believe they have summoned a savior. They have no idea what they have actually brought into their world.