After learning recent rumors, the Shinsengumi prepare to send Chizuru to Shimabara for a top secret spy mission. Unfortunately, Souji, with his worsening illness, must remain bedridden during all the excitement.
While Chizuru infiltrates Shimabara under the guise of a geisha, Hajime Saito and Susumu Yamazaki remain nearby to guard her. Their help ends up being needed.
After the incident at Shimabara, the Shinsengumi begin working at checkpoints across Kyoto. However, conflicts arise with the Shogunate officials, and Sanosuke Harada puts his life on the line to protect what is right.
The master forerunner can get too impassioned. Fearfully concerned for Chizuru's safety on her mission, Heisuke Toudou tries to keep an eye on her. Nevertheless, after leaving to plead for her dismissal, he realizes his dreadful mistake.
Being vice commander is no easy job. Fetching a pretend geisha from the red-light district, facing off devils on the street, and writing a decent haiku are all on Hijikata's to-do list.
It is not easy for a proud, egotistical demon leader to get a bride. Nonetheless, Chikage Kazama haunts Chizuru Yukimura, promising to sweep her away someday.