Ninja Girls

Ninja Girls (乱飛乱外, Rappi Rangai), is a manga series by Tanaka Hosana.

Plot
The story revolves around a boy named Raizou Katana. He was living in a village where the villagers despised him for having a horn on his head. When he saves the life of Kagari (a kunoichi), he discovers that he is the illegitimate heir to the fallen Katana clan and must revive his household to its original state. Together with fellow Kunoichi Kisarabi and Himemaru, they set out to revive the clan by marrying Raizou to a princess of another household and borrowing their power. Throughout the series, Raizo eventually wins over several princesses but ends up running away due to various misunderstandings. All the while, a group led by the mysterious Kabuki Seigan also attempt to gain control over the other households, only to meet with failure through the intervention of Raizou and his followers.