Saizo and Shinobu were childhood friends who were separated years ago. Now teen-agers, Saizo is a novice ninja and has come back into Shinobu's life, determined to be her protector even as he struggles with deeper feelings for this strong-willed girl. When Saizo was orphaned, a caring family took him in. His new brother Sasuke still sees it as his duty to protect Saizo, even as Saizo protects Shinobu. But Sasuke isn't too crazy about Shinobu, who he sees as a stuck-up, spoiled brat. Things only get worse when her mother comes for a visit. To complicate matters, there's another attempt on Shinobu's life!