I Picked It Up From Another World

The world has been reduced to a desolate wasteland where nothing remains of the fallen soldiers but their scattered bones. Amidst this widespread devastation, humanity teeters on the edge of total extinction, and it is only a matter of time before the entire planet faces absolute annihilation. The ruins of civilization stand as silent testaments to a catastrophic collapse, leaving behind a grim reality where survival seems increasingly impossible against the encroaching end. Determined to prevent this inevitable doom, a man named Kyung-Hoon refuses to surrender to despair. While scavenging through the remnants of a ruined city, he makes a crucial discovery inside an abandoned building: a ten-year-old mobile phone that still holds a faint trace of functionality. Rather than being a mere relic of the past, this outdated device becomes his most vital tool. Utilizing the unexpected capabilities of the old phone, Kyung-Hoon initiates contact beyond the boundaries of his dying reality. He begins searching for critical clues in another universe entirely, hoping that answers from a different world hold the key to salvation. With time running out and the fate of everything resting on his shoulders, his desperate mission across dimensions becomes humanity's final chance to avert complete destruction.