While visiting her uncle for the summer, six year old Hotaru gets lost in the woods outside the village. Scared, the crying girl is eventually rescued by a gentle youkai named Gin, who is burdened with a curse that will cause him to disappear if ever touched by a human. Though they are barred from physical contact, the two become close friends. But after a few short years it becomes apparent that Gin ages more slowly than humans, so while Hotaru is growing up and changing, Gin remains in stasis. How will Hotaru adapt to the complicated emotions she develops as her and Gin's ages gradually converge?
A young human girl meets a mysterious abnormal boy who hides behind a mask. Both share gorgeous animation, dramatic moments, and bittersweet feelings from beginning to end. Hotarubi no Mori e focuses more on romance while Fuse is a bit bloody and violent at times, but I feel like fans of one could appreciate the other to some extent.