If you want to see:
A more traditional ninja type story
Intense and thrilling fights filled with martial arts,
Good action with some nasty monsters
Interesting characters with an interesting power and skills,
Slash and gore with some nudity,
Some horror moments,
Cool main male character,
Love tension between two main protagonists,
Good animation that perfectly illustrate all of that,
Than you have to watch Juubee Ninpuuchou!