In , the story follows 15 Touken Danshi —spirits of legendary Japanese swords manifested in human form—who find themselves drifting through time without their master, the Saniwa . The Core Conflict

: A fox guide named Konnosuke appears to lead the 15 blades, organizing them into five teams to conduct "onslaught investigations".

Details on a (like Mikazuki Munechika or Mumei)

: A mysterious "doppelganger" character who appears during the campaign, adding a layer of intrigue to the mission. Ending and Resolution

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The world is under threat from the , a force of insectoid beings determined to alter historical events to create paradoxes.

More information on the the game covers

: A major driving mystery is the disappearance of the Saniwa during an HRA attack on their base, the Honmaru . The hope of their master's return is what motivates the blades throughout the game.