So... is Ninja Skooler finished or not?
NO, it is not finished.
Why?
We found unfinished core content:
Ninja skooler (Base)
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:
Include manga
Include non-core content