So... is RDG: Red Data Girl finished or not?
It is a bit ambiguous in this case.
Why?
The anime finished before the manga:
Anime finished: June 20, 2013
Manga finished: July 26, 2014
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
RDG: Red Data Girl follows Izumiko Suzuhara, a shy and sheltered fifteen-year-old who has always lived a secluded life at a mountain shrine. She struggles with being 'normal' and has a strange ability to disrupt electronics.
Driven to change, Izumiko takes her first step by changing her appearance, which creates ripples in her small world. Suddenly, she's thrust into even more unusual circumstances when her guardian assigns Miyuki Sagara, a boy she knows and dislikes, to be her protector.
Miyuki is skeptical of Izumiko's supposed specialness, even though his father calls her a goddess. The story explores the complicated relationship between Izumiko and Miyuki as they are forced to work together. Izumiko's journey is about finding herself and understanding the mysteries surrounding her existence, while navigating the challenges of teenage life.