 If you liked
Harukanaru Toki no Naka de: Maihitoyo
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 ...then you might like
Hotarubi no Mori e
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Both are about spirits and beautiful romance. In both anime the girl falls in love with a spirit, Harukanaru although the movie is longer, the romance is deeper with beautiful graphics and plot. Hotarubi has drama just like Harukanaru, where you will shed tears.
The differences are that in Harukanaru there are more characters involving around the female protagonist while in Hotarubi there are little minor characters