Geten no Hana

The era is the Warring States Period. Hotaru is a ninja from Iga who is sent to infiltrate Azuchi Castle, stronghold of the warlord Oda Nobunaga and Akechi Mitsuhide Nobunagas confidant. "Ive decided to keep you..." She ends up working for Oda Nobunaga and impersonates Mitsuhides sister in order to stay in the castle. Azuchi Castle, Nobunagas home... What is with these feelings that begin to grow between Hotaru, the warlords and Nobunaga?