So... is Crash! finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: November 27, 2012
Manga finished: November 02, 2013
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
Crash! appears to be a short anime, possibly an adaptation from a manga featured in Ribon magazine, that was broadcast in three installments on TV as part of special segments during the Oha Suta program.
Without revealing specific events, it's safe to assume the anime presents a compact story within those three episodes.
The narrative likely involves some sort of conflict, challenge, or potentially a romantic entanglement, given the Ribon magazine demographic, which the main characters must navigate within the short runtime.