Shinobi no Ittoki.

Ittoki Sakuraba was an ordinary student, until his life was turned upside down! He finds out that he is the 19th heir of the famous Iga Ninjas. The Iga must try to defend what is theirs from the Koga, a rivaling clan seeking to end Ittoki’s life. Ittoki is left with no choice but to become a shinobi that’s strong enough to not only protect…