The era when Samurai and Ninja existed in Japan. Rikka Isurugi was born and raised in a Ninja clan secluded from society. She soon meets Miya, a girl with a mysterious power, who is found lost in the mountains. As Rikka is concerned that someone is pursuing Miya, she also asks the head the of Isurugi Ninja Clan for permission to avenger her father's death. Soon Rikka faces danger with the attack of the Negoro group but…

The descendants of the legendary Fuma ninja clan face off against the Tokugawa shogun's family of Yagyu samurai as they kidnap women in the hopes of finding a concubine for the shogun

The worlds of Black Fox and Shogun's Ninja are fused!