It is a bit ambiguous in this case.
The anime finished after the manga:
Anime finished: September 21, 2019
Manga finished: September 09, 2019
... But we could not confirm the source content in MangaUpdates.
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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Araburu Kisetsu no Otome-domo yo. follows five high school girls in their literature club as they grapple with the concept of sex and its impact on their lives.
One of the girls' casual suggestion sparks a journey of self-discovery and confusion as they begin to explore their feelings and desires.
Kazusa, one of the members, struggles particularly with her past relationship with a childhood friend and how her feelings for him have evolved.
The girls navigate the challenges of their newfound awareness while also trying to keep their somewhat controversial literature club from being disbanded.
The anime explores the awkwardness, anxieties, and unexpected humor that arise as these young women confront their own sexuality and the complexities of growing up.