KIFUU Tatsumi

Far away in a deep mountain forest, on the border of the world of mononoke, there is a village called Oumimura. Kinko, a fox cub, goes to Sakurazamura to look for his missing brother, Ginko, and meets Atsushi, a human boy. For some reason, Atsushi is the only one who can see the fox, and the two quickly become friends. The fox is attracted to Atsushi's innocence, and soon develops an illicit feeling for him.