When a demon begins to devour virtuous monks and Shinto priests in the region, Hisui is assigned to guard his father, Miroku, who has been undergoing harsh training for the past two years.
Towa and Setsuna set off to slay Homura, an evil mountain god who has abducted a beautiful maiden. The twins learn that Homura was involved in the forest fire that separated them.
The truth behind the night that sealed the fate of Towa, Setsuna, and Moroha’s parents is finally revealed.
Moroha once had a master named Yawaragi, who was keeping a life-threatening secret. In order to resolve the secret and protect her pupil, Yawaragi made an agreement with Jyubei.
Konton devises a plan to destroy the Half-Demon Princesses. Riku offers to help him out. The three girls are lured into a ravine and fall right into Konton’s trap.
Konton learns of the origins of the Rainbow Pearl and the connection between Kirinmaru and the Dream Butterfly. He summons an ogre to attack the Half-Demon Princesses.
The deputy shogun’s daughter Aiya offers to employ the demon slayers if they win in a battle against the bounty hunters.
Setsuna opens up to Towa about the hidden village for half-demons where she was raised for most of her childhood.
On the night of the new moon, Riku pays Towa a visit to chat. Unfortunately, he’s not the only one planning to drop by.
Zero removes the seal that Miroku placed on Setsuna to suppress her demon powers, awakening the latent demon blood within.
Setsuna and Towa hire Moroha to help slay Zero. The trio successfully track Zero down, but Riku stands in their way.
Towa, Setsuna, and Moroha are left to confront Kirinmaru, but in the face of overwhelming power, they must pay a great price.