Geten no Hana

A woman from Iga Village enters Aduchi Castle under a false identity to gather intelligence on the Oda army and identify potential threats to Oda Nobunaga. Pretending to be the sister of Akechi Mitsuhide, one of Nobunaga's trusted advisors, she remains in the castle and builds connections with key military figures, including Nobunaga himself, Hashiba Hideyoshi, and Tokugawa Ieyasu. Her mission is at risk if her true identity is discovered.