Seikimatsu Occult Gakuin

After her father's death, Maya Kumashiro returns to Waldstein Academy determined to shut down its devotion to occult research. In the summer of 1999, however, she meets Fumiaki Uchida, a man sent back from a future devastated by an alien invasion.

Fumiaki must locate the Nostradamus Key before it brings about that disaster. Despite Maya's hostility toward the occult, the two form an uneasy partnership and investigate the academy's supernatural disturbances, searching for a clue that could prevent the future he knows.