Mikado Shuuji is just an ordinary guy, but he has a very unusual knife
that he uses for cooking. It's actually a famous short sword that marks
its owner as the head of the ninjas, and now there are hot ninja girls
coming after him to take it back. Hinamori Botan is one of those hot
ninja girls, but her efforts to attack Shuuji mostly end up
inadvertently stripping her. After she concludes that she does not want
to steal the sword and kill Shuuji, she ends up deciding to serve him as
a ninja instead. Now she must protect him from the other ninja that
come to claim his sword and his life!