[Twin Abilities] + [Ability Awakening] + [Growing Protagonist] + [Bonds with Companions] + [Mind-Game Instances]
In the Other Century, Cavities are natural disasters in the human world. They take root across the land and feed on humanity's vitality.
When Xikanai was twelve, his parents died beneath a Cavity's blade.
At nineteen, he enters an ability-user training camp and becomes an ability user. Grow stronger, take revenge, uncover the truth: he thinks these are the only things that give his life meaning.
Until he discovers that Cavities are not natural disasters. They are man-made.
Someone breeds Cavities. Someone uses them. Someone is wagering the entire world.
Xikanai looks down at his hand.
In his palm, a fissure unlike any ability slowly opens its eye.
Now he understands what he must do with his future.
Cavities devour the earth and consume all living things. Let my body become the seal, and let there be only one Apostle.
