Katame dake no koi 2004

Directed by Mamoru Watanabe

Yuka, a high school girl who lost her mother at a young age and lives with her father, has secretly been in love with her cousin's husband, a university lecturer named Inoue, since she was nine years old. One day, the Inoue couple move into the neighborhood, and Yuka's previously suppressed desires begin to flare up.