Via official synopsis.
From the studio behind Attack on Titan comes the directorial debut of a bold, new voice in the world of anime.
Kurumi’s heart was broken by the sudden death of her boyfriend in a tragic airplane accident. Forced to carry on without her beloved Hal, she fell into a reclusive and joyless existence. Kurumi had given up on the world, but a brilliant scientist devised a plan to win her back. By melding futuristic technology with the binary equivalent of human emotion, they created an ultra-lifelike robotic surrogate to take Hal’s place — and lure Kurumi from her shroud of solitude. Resistant at first, this shattered beauty slowly yielded to her feelings of longing — and took comfort in the company of a robot. Though their unique bond grew stronger with each passing day, Kurumi and Hal would soon discover that nothing about their artificial love story was quite as it seemed.