One night, two mysterious figures infiltrate the Twelfth Squad’s laboratory for nefarious purposes, wiping out a third of Seireitei in the process. Amidst the commotion, the intruders approach Rukia and indirectly cause everyone she knows to forget about her – that is, except for Ichigo, who manages to escape this mind alteration. Sensing that something is wrong, Ichigo travels to Soul Society for answers; but with obliterated memories, everyone treats him as an enemy. Now, with all thirteen protection squads chasing him, can Ichigo find a way to retrieve the lost memories of his friends and rescue Rukia - not to mention find out why was she targeted in the first place?
Freed from his longtime prison, Belldandy's mentor Celestin is once again trying to overthrow the Goddess System, but he can't do it without her. To "help" her decide anew whether to join him, he blocks her memories of Keiichi. As Keiichi and company race to restore Belldandy's memory, Keiichi also has to deal with the mysterious Morgan, the one who released Celestin in the first place!
Both the Ah! My Goddess movie and Fade to Black pit the main chracters in similar situations. In both, someone from the female lead's past returns and wipes her memory of everything from the series. Both movies definitely have a more emotional and serious feel to them than the series.