Aya Mikage is a seemingly normal high school student until her 16th birthday, when her family imprisons her twin brother and attempts to kill her. She learns she carries the blood of the tennyo (heavenly maiden), and when upset, she will transform into the goddess Ceres. If she is allowed to live, she will bring ruin upon her family. Aya's trip home turns from happiness to tragedy when her own mother suddenly lunges at her with a knife, triggering Aya's sudden transformation into Ceres! Yûhi and Tôya arrive before any more harm is done, but now they are overwhelmed by Ceres' sheer power. Will Yûhi's reckless plan to bring Aya's personality back succeed? Then, Aya follows Tôya right into Mikage headquarters! Can anyone save Aya once Kagami gets his hands on her?!