As summer tensions rise, Naoto and Rika's new relationship draws the attention of their jealous classmate Meimi, who becomes vulnerable to the devil's lingering influence. Transformed into the antagonistic Misty, Meimi launches an assault that forces Luvriel to empower Rika as the angelic Sei Tenshi Djibril once more. With Naoto's support, Rika must balance her personal feelings against the ongoing celestial conflict, striving to protect those she cares for without losing herself in the fight.