The Kagemori family has secretly protected its neighbor, the Konnyaku family, for 400 years. Mamoru has been the protector of the daughter, Yūna Konnyaku, since they were in kindergarten. When Yūna is in trouble, Mamoru quickly puts on his ninja suit and transforms into a competent ninja; able to protect her from harm. Unfortunately, this poses quite a challenge as Yūna, being both clumsy and absent-minded, often stumbles into situations where Mamoru must once again come to her rescue.
I liked this anime, but I don’t recommend it. It is a bit to formulaic and there is better stuff out there. If you like wacky ninja scenarios then by all means watch it because you might like it too. I will say you gotta love the Banana song. Some of the over-the-top fights and scenes were really funny and some just gave you a “What is going on here?”. I am curios what others think though.
Here are a few images. To see more check out the Flickr Set (Kage Kara Mamoru Flickr set)