Ah! My Goddess: The Movie

'Ah! My Goddess: The Movie (劇場版「ああっ女神さまっ」 Gekijōban "Aa! Megami-sama!")' is a 2000 Japanese animated film by AIC. Three years prior to the events depicted in the film, Belldandy, a goddess from heaven, comes to live with Keiichi, an engineering student attending the Nekomi Institute of Technology. Celestine, a high-ranking god who served as Belldandy's mentor for most of her training, returns from imprisonment with a plan to infect the Goddess System with a virus. Celestine needs Belldandy to effect his plan, but must first destroy the bond between Belldandy and Keiichi.

Scene Summary
Celestine hypnotized Belldandy to restore her loss memories.