In a world unknowingly fractured into seven isolated lands, kai Karuizawa, a brilliant astronaut and scientist, embarks on a groundbreaking mission to uncover the truth behind the "Septerra Phenomenon"—the mysterious existence of Earth's missing fragments. When his crew crosses the dimensional rift, disaster strikes. Their ship malfunctions mid-landing, resulting in a catastrophic crash. Kai awakens, battered and alone, surrounded by an unfamiliar and perilous world. His comrades—his closest friends—are gone.

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Chapter 23 - Relapse