Kaze HikaruKaze Hikaru.

Kaze Hikaru (Japanese: 風光る) is a Japanese manga series written and illustrated by Taeko Watanabe. Set in the bakumatsu period, the story follows Tominaga Sei, a young girl who poses as a boy named Kamiya Seizaburō so she can join the Mibu-Roshi (Special Police; later known as the Shinsengumi). She befriends her sensei, Okita Sōji, who discovers her secret.