Kage Kara Mamoru! is the story of a boy and his family and their duty to protect their neighbours. His family are ninjas, he protects the neighbour girl, while his dad protects the neighbour dad and his mom, the neighbour mom. His family has been sworn to protect the neighbour family for 400 years. While protecting the girl, the boy falls in love with her. This series is about the boys adventures trying to protect her, and not always succeding but becoming stronger and finally winning her over.
This anime is light harted and comical. I would recommend this for anybody.