In the village of Ayagami, Mikoto and Takeru advance their exorcist training alongside Yamato, sensing an unsettling presence that echoes their mother's past deeds. As local disturbances intensify, the sisters uncover the sealed demon's lingering influence and realize that only the Haramiko's sacred power can achieve a lasting containment. Faced with this revelation, they weigh the personal costs of channeling such energy. Their resolve strengthens as they prepare for the trials that will test their limits in this pivotal stage of their journey.