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The story revolves around a living creature which came from a comet named WoO; in the series, WoO is befriended by a young girl named Ai; both are chased by a mysterious organization called SWORD who sees WoO as a threat to humanity. At the same time, giant monsters have invaded in search of WoO.
The season & episode guide for Bio Planet WoO is still being assembled — check back soon.
Select anyone for a tight summary — the full story lives on their Person page.