Genre - Mystery

One day, Nao's father suddenly announces shocking news! Because his friend helped him with his debts, Nao's father agreed to have Nao and his friend's son engaged! Nao is furious with this agreement and transfers to her fiancé's school, Kaei Academy, in order to make her fiancé break off the engagement. But how can Nao force her fiancé to break it off when she doesn't know what he looks like?! Join Nao in her quest to find her "husband-to-be"!!

Yoshino Takigawa is visiting his friend`s parents and sister`s grave. After he gets there, he is met by Evangeline Yamato, a woman looking for his friend Mahiro Fuwa, who left a month ago to find his family`s killer without any clues to who it might be. Evangeline informs Yoshino that two places where Mahiro has been spotted have been quarantined, due to an epidemic. When Evangeline is questioning Yoshino at gun-point, Mahiro comes out of nowhere and swiftly saves him and can stop bullets in mid-air, claiming to be a sorceress`s assistant; not just any, but the strongest sorceress`s, Hakaze Kusaribe, who promised to help find his family`s killer with her magic so he can kill them himself. After saving him, Mahiro informs Yoshino about the epidemic, a curse that turns living things into metal, claiming sorcerers are causing it and that it is just the beginning.

Judges are the messengers of the Central Government, sent out to punish delinquent cities. They have the ability to control programmed seeds, causing explosive growth. After a disease breaks out among the Children of Babel, those Judges who are given power through Centrals research, Central requires the data of a natural Judge like Sion. However, Central is also interested in the legend of the Heavenly City, which Sion is named after; what could their true purpose be? (From Storm in Heaven)