Tada, Kimi o Aishiteru (2006)
Heavenly Forest is a 2006 Japanese romance and drama film based on the novel written by Takuji Ichikawa. It was also released as a manga. The film was directed by Takehiko Shinjo, and focuses on the relationship that evolves between a photographer named Makoto, and two of his female university classmates, Shizuru and Miyuki.
More at Wikipedia.