The Zombie Brother from Another World Is Coming

A killer in the ordinary world of the earth was betrayed by his own killer organization during a mission. After his death, he traveled to a different world and began his new journey! From improving strength, to developing forces, and responding to enemy attacks, the comprehensive civilization he led finally successfully entered the interstellar era! He should have been extremely happy, but found that the universe here was not what he imagined. It was only then that he discovered that this world did not seem to be simple...