So... is Cosmic Baton Girl Comet-san☆ finished or not?
It is a bit ambiguous in this case.
Why?
All detected relations are finished, but we could not confirm the source content in MangaUpdates. Please check the release order section for a complete list of relations.
Watching Order (by release date)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
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Synopsis
Comet, a princess from the Harmonica Star country, journeys to Earth to find a missing prince from the Tambourine Star country, whom she was supposed to marry. She must identify him by the starlight in his eyes.
Accompanied by her loyal puppy Rubba Ball, Comet quickly falls in love with Earth and its people.
However, she's not alone in her search. Princess Meteor from the Castanet Star country is also on Earth, also searching for the same prince.
Comet must navigate the challenges of a new world while competing with another princess, all while using her magical baton and pendant to find the prince before Meteor does.
She is not the first from the stars to live on Earth, and has a forest fairy watching over her.