Nice atmosphere, and I suppose the moral of the story is that it's worth it to know someone, even if you can't be with them forever.
Still, I'm not sure I feel satisfied with the implications of the end. 5 generations later, in my disturbed head canon:
"Hi, I'm [insert flower name]! I'm heard all about you. So you're the ancient ghost who's been haunting this mirror for hundreds of years??"
"Nice to meet you! Nah, I'm just an ordinary little girl named Camellia who's been cursed by this mirror to have friends who die a little while after I meet them."