Embark on a Thrilling Post-Apocalyptic Adventure with 'Swallowed Star'. In a world marred by chaos and disaster, the sudden appearance of the enigmatic RR virus plunged Earth into an abyss of destruction. Infected animals underwent horrifying mutations, unleashing monstrous horrors upon humanity. Faced with impending doom, survivors rallied behind massive walls, establishing base cities as the last bastions of human existence. This harrowing era of suffering became known as the Great Nirvana period. Amidst this harsh reality, humanity's physical prowess saw an unprecedented evolution.