Invasion of Alien Beasts: Blue Star and I Create Gods Together

In the 23rd century AD, in order to explore the truth of the universe, mankind built a cross-continental particle collider. A hole opened in the sky, and a mysterious energy instantly enveloped the earth. Terrifying beasts flew out of the space cracks. Since then, humans and alien beasts have begun a decades-long war. As increasingly powerful alien beasts come, humans have been retreating steadily. In the end, the heads of state led the surviving humans to establish the Blue Star Federal Government, and pooled all resources to build a giant steel city thousands of meters high, named "Fortress", which temporarily blocked the attack of the alien beasts. As time goes by, the hole gradually becomes larger, and the time for the arrival of more terrifying alien beasts is getting closer and closer, and the human federation has fallen into despair. Until a handsome young man broke into the federal command center, a new era began...