Date A Live, Vol. 7 (light novel): Truth Miku (Volume 7) (Date A Live (light novel), 7)

Things are looking grim. The entire city of Tengu City has been enthralled by a spirit. Worse, Tohka has fallen into the clutches of DEM. When Shido feels trapped by this seemingly hopeless dilemma, the sinister Kurumi Tokisaki appears before him with the worst possible timing...and offers to help rescue Tohka?!