Cabin Traveler

In 2025, with the advent of mechas and the frequent appearance of UFOs, mankind is shocked to realize that what is under their feet is not their home, but the entrance to the civilization in the center of the earth. When martial arts and psychic powers rose, humans joined hands and stepped into the sea of ​​stars. However, thousands of years later, they encountered the most terrifying truth: the bright galaxy is just a giant petri dish imprisoning them. Three generations of heroes, one after another, are they willing to be the brain in the vat, or are they willing to smash this false sky? Their choices will determine whether civilization will sleep forever or live towards death.