So... is Eromanga-sensei finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: June 25, 2017
Manga finished: August 10, 2022
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
Masamune, a light novel author, discovers his reclusive stepsister, Sagiri, is secretly the famous and provocative illustrator "Eromanga-sensei" he's been working with.
Their unexpected revelation forces them to navigate the challenging world of light novels together, balancing family dynamics and professional collaboration.
As Sagiri gradually overcomes her social withdrawal, they both strive for success in the competitive industry, all while she tries to keep her secret identity hidden from their peers.