In the shadows of Tokyo, humanity has learned to live alongside Vestiges—alien parasites once unstoppable, now contained by the UCS. But peace is fragile.

Kenji Tanaka, son of a legendary UCS commander who vanished three years ago, just started his freshman year at Shibuya University. When his friend nearly transforms into a blood‑red horror in an abandoned tunnel, Kenji’s world is torn open. Drawn into UCS’s secret research, he’ll uncover brutal truths about Vestiges… and the fate of his own father.