So... is Girlfriend (Kari) finished or not?
It is a bit ambiguous in this case.
Why?
The anime finished before the manga:
Anime finished: December 29, 2014
Manga finished: February 27, 2015
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
Girlfriend (Kari) centers on Shiina Kokomi, a dedicated and good-natured high school student who excels in rhythmic gymnastics.
The anime chronicles her everyday life as she navigates the ups and downs of high school.
It focuses on her relationships with her friends and the support they offer each other as they face various challenges.
The story highlights themes of friendship, camaraderie, and the experiences of high school life.