Hayaku! Island of Darkness

Hayaki is a skilled soldier and member of Reikan, an elite organization that investigates and stops anomalous activity. When a mysterious island is suddenly overrun with dangerous, unpredictable creatures, Reikan sends Hayaki to investigate. But his mission runs deeper than duty — his brother, another Reikan operative, vanished on this island under unexplained circumstances. Driven by the need to find the truth, Hayaki will not stop until he has uncovered everything the island is hiding.