Based off of a popular light novel series from Fujimi Fantasia Bunko, which inspired three anime adaptations, DATE A LIVE, DATE A LIVE II, DATE A LIVE III, and the anime movie Gekijoban DATE A LIVE: Mayuri Judgement, the story of DATE A LIVE begins thirty years after a series of large disasters, known as Spacequakes, that were caused by the appearance of mysterious entities known as Spirits.