The ancient ninja clan known as the Shidoshi has struck, determined to absorb all worthy young ninja into its ranks and kill the rest. Their most dangerous agent, the ninja vampire Kyonshi, has spoiled, rich ninja Tetsuo Rivalsan at his mercy. Tetsuo's superstrong teammate Nanashi must risk all to save the man she loves, even if he's too proud to thank her properly. Or is he? Vampire ninja's, drastically cute but dangerously ravenous aliens, gender-bent warlocks bent on revenge, super-powered girlfriends returning from space, and more! See why Ninja High School can still teach everyone else a lesson about America manga!