Gifu no aibu: Kuikomu shitasaki(2013)

Asami returns home for the third anniversary of her mother's death. Her father, Shinji, said he had rented an apartment near their old house and was living in a neatly organized room. After the memorial service, Asami receives a letter from her mother's best friend, Taeko, which her mother had left behind, and learned that she and Shinji were not related by blood.