Half-remembered Japanese animated film from my childhood
Hi ! I'm looking for a Japanese animated film I watched in the 2000s. Here's what I remember:
Main plot:
- The two main characters are a human man and a female vampire. Their relationship starts dramatic but ends as a romance with a happy ending.
- The vampire woman uses a parasol/sunshade (probably to protect herself from sunlight).
Key scene I remember most:
- At some point, the two characters end up in a strange, psychedelic/surreal dimension. This world is some kind of reincarnation cycle — souls pass through it and lose their memories as they're reborn.
- To avoid losing their memories, they have to dodge large hammer-like obstacles that swing or fall at them — getting hit means having your memories erased.
- At one point, the male character temporarily regresses and becomes a baby.
- After escaping this world, there's a scene where the man catches/retrieves the vampire woman's parasol.
Other details:
- I believe the vampire woman may have had purple hair (not 100% sure).
- The film had a happy ending.
- It was probably a standalone movie, not a series.
- Style felt like early-to-mid 2000s Japanese animation.
Does anyone recognize this? Any help appreciated!