Ooshima Island’s Lush Calm Shattered by Infectious Despair

Amid the serene yet chaotic Ooshima island in the Seto Inland Sea, the once-peaceful landscape now harbors madness and infection. UNKNOWN – LEVEL 4 resurfaces, turning the island into a zone of despair. Makoto, Ayatsuki, Ayanagi, and Taya flee through the forest, hoping to reach the shrine where Rey Murakami, Taya’s trusted ally, resides. However, the infection spreads rapidly, and the forest teems with the infected, threatening their escape.