So... is Sengoku Otome: Momoiro Paradox finished or not?
It is a bit ambiguous in this case.
Why?
The anime finished after the manga:
Anime finished: June 28, 2011
Manga finished: January 27, 2011
... But we could not confirm the source content in MangaUpdates.
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
Yoshino Hide, an ordinary girl prone to mishaps, accidentally travels back in time to the Sengoku Era after a mishap at a shrine.
She discovers a drastically different Sengoku Era, where all the historical figures are female.
Yoshino becomes entangled with Oda Nobunaga and decides to assist her in the quest to find the legendary Crimson Armor.
The Crimson Armor is said to grant its wearer the power to unite all of Japan.