If you're looking for anime similar to Bleach Movie 3: Fade to Black - Kimi no Na o Yobu, you might like these titles. All recommendations are made by Anime-Planet users like you!
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.