S1 · E1
Watch Bio Planet WoO together — synced playback, live chat and reactions. Up to 12 people.
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.
