Into the Forest of Fireflies' Light

Hotarubi no Mori e (蛍火の杜へ, lit. "Into the Forest of Fireflies' Light") is a one-shot shōjo manga written by Yuki Midorikawa. It was published in the July 2002 issue of LaLa DX in Japan, and in July 2003 it was reprinted in a tankōbon short story collection of the same name, which included four romantic one-shot stories written by Midorikawa.

A 44-minute anime film with the same title was produced in 2011 at the anime studio Brain's Base and directed by Takahiro Omori.

Plot
The story of Hotarubi no Mori e centers around Hotaru, a little girl who gets lost in an enchanted forest where apparitions reside. A young boy, Gin, appears before Hotaru, but she cannot touch him for fear of making him disappear.