So... is Stella no Mahou finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: December 19, 2016
Manga finished: December 18, 2021
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
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
Stella no Mahou follows Tamaki Honda as she starts high school and decides to join a doujin game development club called SNS Club.
The story centers around Tamaki learning the ropes of illustration and contributing to the club's projects.
She collaborates with other club members, including a programmer, a writer, and a composer, to create their next doujin game, showcasing the teamwork and challenges involved in amateur game development.