I only remember the main outline, and most likely it wasn't the sole focus of the movie. More of a sub-plot or perhaps a sub-story in an omnibus.
There's an entartainer (could be an idol/actress/singer), who loses her sight (either due to an assault or an illness). She is forgotten by the show-biz world, until one day a fan appears before her and proclaims that he'll care for her from now on (he may or may not confess his love as well at that point).
Genre: Drama, seemed Shunji Iwai-esque in style,
Production date: late 90s/early 2000s