Hotarubi no Mori e (2011)
Original title: 蛍火の杜へ
Hotarubi no Mori e is a 2011 Japanese-language romance movie directed by Takahiro Omori, with a running time of 45m.
One hot summer day a little girl gets lost in an enchanted forest of the mountain god where spirits reside. A young boy appears before her, but she cannot touch him for fear of making him disappear. And so a wondrous adventure awaits...