Far Away So Close (Tooku de zutto soba ni iru)

Sakumi was seventeen when she had such a car accident that the next ten years of her life are a blank. She lost any recollection of the ensuing ten years. She would like to regain the memories and that portion of her life and has Yoshihiko to help her. Yoshihiko is an old friend and a class-mate who also has feelings for Sakumi.