So... is Mayoi Neko Overrun! finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: June 29, 2010
Manga finished: February 24, 2012
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.
The mangas and the non-core contents are excluded by default, but you can enable them by clicking the buttons below:
Synopsis
Mayoi Neko Overrun! centers on Takumi, a high schooler whose life revolves around school, his childhood friend Fumino (who expresses her feelings in a roundabout way), and helping out at the Stray Cats confectionery run by his adoptive sister, Otome.
Takumi's relatively normal routine is thrown into disarray when Otome brings home a mysterious runaway girl named Nozomi.
As Takumi attempts to understand Nozomi's past and the reasons she's running away, his everyday life transforms into a chaotic and exciting adventure.