NO, it is not finished.
We found unfinished core content:
Motto! kage kara mamoru! (Sequel)
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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Kage kara Mamoru! centers on Kagemori Mamoru, a seemingly ordinary and unremarkable boy who is anything but.
Unbeknownst to most, Mamoru hails from a family of ninjas who have secretly pledged to protect their neighbors, the Konnyaku family, for centuries.
Specifically, Mamoru has been tasked with guarding Konnyaku Yuuna, the family's daughter, since childhood.
The anime follows Mamoru as he juggles his normal, unassuming life with his secret duty. Whenever Yuuna faces danger or hardship, Mamoru transforms into a skilled ninja, safeguarding her from the shadows.
Thus, the series explores the dynamic between the outwardly clumsy Mamoru and his powerful ninja alter ego, all while he attempts to keep his true identity a secret from Yuuna and the rest of the world.