Story Structure — 5 Plot Phases
Ancient Warrior's Return
Kennosuke, a samurai from the Sengoku period, reawakens in modern times inside the Cube artifact, meeting Yukina who becomes his navigator.
Key Events
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Samurai's Awakening — Kennosuke reawakens in present day inside the Cube Characters: Ouma Kennosuke Tokisada, Shirahane Yukina
Location: Cube artifact
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Alien Invasion — Extraterrestrial force invades Earth Characters: Ouma Kennosuke Tokisada, Shirahane Yukina, Efi Dorg
Location: Earth
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Defense Alliance — Alliance with UN defense forces formed Characters: Ouma Kennosuke Tokisada, Shirahane Yukina, Ogino Mika, Akagi Ryoto, Kayahara Jundai, José Carlos Takasuga
Location: Kurobe Laboratory
Alien Threat Emerges
The Efi Dorg alien force invades Earth with the goal of collecting Pivot Stone fragments to dominate the planet.
Key Events
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Defense Alliance — Alliance with UN defense forces formed Characters: Ouma Kennosuke Tokisada, Shirahane Yukina, Ogino Mika, Akagi Ryoto, Kayahara Jundai, José Carlos Takasuga
Location: Kurobe Laboratory
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Mecha Activation — Kennosuke activates the Black Relic mecha Characters: Ouma Kennosuke Tokisada, Shirahane Yukina
Location: Kurobe Laboratory
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First Clash — First major battle against Efi Dorg forces Characters: Ouma Kennosuke Tokisada, Shirahane Yukina, Efi Dorg
Location: Battlefield
Unlikely Alliance
Kennosuke and Yukina form an alliance with the UN Kurobe Laboratory defense forces to combat the alien threat.
Key Events
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First Clash — First major battle against Efi Dorg forces Characters: Ouma Kennosuke Tokisada, Shirahane Yukina, Efi Dorg
Location: Battlefield
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Artifact Discovery — Discovery of Pivot Stone fragment Characters: Ouma Kennosuke Tokisada, Shirahane Yukina, Ogino Mika
Location: Ancient site
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New Allies — New allies join the team Characters: Ouma Kennosuke Tokisada, Shirahane Yukina, Sophie Noël, Tom Borden
Location: Kurobe Laboratory
Artifact Hunt
The team races against the Efi Dorg to collect the fragments of the Pivot Stone, discovering more about the ancient artifact.
Key Events
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New Allies — New allies join the team Characters: Ouma Kennosuke Tokisada, Shirahane Yukina, Sophie Noël, Tom Borden
Location: Kurobe Laboratory
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Major Battle — Major confrontation with Efi Dorg forces Characters: Ouma Kennosuke Tokisada, Shirahane Yukina, Efi Dorg, Tom Borden
Location: Urban area
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Stone Assembly — Efi Dorg attempts to collect all Pivot Stone fragments Characters: Ouma Kennosuke Tokisada, Shirahane Yukina, Efi Dorg, Luu Shenmi
Location: Final location
Final Confrontation
The ultimate battle as Kennosuke and his allies face the Efi Dorg in a final attempt to prevent Earth's domination.
Key Events
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Stone Assembly — Efi Dorg attempts to collect all Pivot Stone fragments Characters: Ouma Kennosuke Tokisada, Shirahane Yukina, Efi Dorg, Luu Shenmi
Location: Final location
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Ultimate Showdown — Final battle to prevent Earth domination Characters: Ouma Kennosuke Tokisada, Shirahane Yukina, Efi Dorg, Sophie Noël, Ogino Mika, Akagi Ryoto, Kayahara Jundai, José Carlos Takasuga
Location: Earth orbit
When mecha attack a research center, its students, pilots, and researchers must fight back with the help of mysterious artifacts and a young samurai.
