Date A Live

Date A Live (デート・ア・ライブ, Dēto A Raibu) is a Japanese light novel series written by Kōshi Tachibana and illustrated by Tsunako. An anime adaptation series was broadcast on AT-X from April 6 to June 22, 2013. Each episode was streamed in lower quality on Niconico a week before its TV premiere. The series continued its broadcast run with Date A Live II from April 12 to June 14, 2014. A film adaptation premiered on August 22, 2015.

Plot
is a high school boy. On the last day of the spring holidays, an explosion destroys the town and a in armor appears in front of him. Shidou's sister-in-law,, tells him that the girl is called "", which causes a timespace quake. Kotori disclosed that she is the commander of the anti-spirit organization and orders him to go out on a date with the spirit girl. Kotori says, "I don't ask you to beat the spirit. Just let her fall in love with you and save the world."

Official

 * Official anime website

Other Sources

 * Wikipedia
 * MyAnimeList