天尽风 ～傀儡阵风帖～

When Mochizuki Hidemitsu, Lord of Azuma and head of one of the great 13 Houses, dies under suspicious circumstances and the lord governing the neighboring Asaka, Ashiya Tatsuyoshi, tries to force Hidemitsu's daughter, Sayo-hime, to marry him, she asks the shinobi of Kasumidanishuu to investigate the death.
While they manage to uncover the truth about the death, this ultimately leads to the annihilation of Kasumidanishuu on the hands of the Meigokutou, a group of Shinobi allied to Ashiya.
The survivors rally around Yashiro Jinma, who becomes the leader of the group that Sayo-hime dubs the Yamabukigumi.