Description

Seventy years after dungeons began appearing worldwide, humanity discovered mana—a substance that accelerates evolution. When Seishirou rescues a woman trapped in a dungeon, he learns she's an Oni, a rare being infused with high-tier mana. Together, they become a bridge between humans and Oni, building something meaningful. But his savior harbors a secret: she will betray him, strip away everything he holds dear, and force him down a path of vengeance.