In the fourth installment of Date A Live, Shidou Itsuka's responsibilities with Ratatoskr continue, presenting fresh challenges. One day, Shidou's routine is disrupted when he aids a woman in need, who turns out to be Nia Honjou, a well-known manga artist and Spirit. Nia, aware of Shidou's covert activities, challenges him to win her over on a date to witness his charm firsthand. As Shidou delves deeper into Nia's past and her connections to Deus Ex Machina Industries, a familiar entity resurfaces, adding layers of intrigue to their encounter.