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Synonyms: Cells at Work [Black], Hataraku Saibou Black PV, Hataraku Saibou Black Special Video, Cells at Work Code Black PV, はたらく細胞BLACK
A special animated commercial first released on Twitter to promote the manga. It was then released on Kodansha's official YouTube channel on January 15.
Set inside an unhealthy body, Hataraku Saibou Black features the anthropomorphized cells of the human immune system as they attempt to keep their ailing world alive.