The fourth season of Date A Live. 
 
Despite the numerous challenges he has overcome so far, Shidou Itsuka's mission with Ratatoskr is far from over. In a departure from his daily routine, Shidou encounters a starving woman lying on the street and ends up helping her. After the two arrive at her apartment, the woman introduces herself as Nia Honjou—a popular manga artist working under a pen name. However, cutting straight to the chase, Nia reveals that she is also a Spirit and is aware of Shidou's secret operation. 
 
Interested in seeing his charisma firsthand, Nia challenges Shidou to win her over on a date. As he strives for an opportunity to seal her powers, Shidou learns more about Nia and her history with Deus Ex Machina Industries, a name he is all too familiar with... 
 
(Source: MAL Rewrite)

Episode 12 - And The One She Chooses Is

Episode 11 - A Fleeting Paradise

Episode 10 - A Battlefield That Shouldn't Be Possible

Episode 9 - A "Second" Date

Episode 8 - The One Who Pulled the Trigger

Episode 7 - The World Tree Sheds Leaves

Episode 6 - The Three Magi

Episode 5 - Mother Mio

Episode 4 - The Spirit of Origin

Episode 3 - The Spirit's Resurrection

Episode 2 - Final Respite

Episode 1 - Beginnings of War

GEEKTOYS

KADOKAWA

Goodshow Animation

Nippon Columbia

Kadokawa Media House

Docomo Anime Store

AT-X

Hot Game Studio

Date A Live IV