Beatless

April. A second year high school student, Arato had a normal life he spent with his friends Ryo and Kengo. Until that night. On his way home from shopping, Arato is attacked by a corrupted hIE, but a beautiful hIE named Lacia comes to his rescue.

After binding an owner contract with Arato, Lacia has come to live with the Endo's. Arato's sister Yuka has completely accepted Lacia, and even enters her into an hIE modeling audition. Meanwhile, Arato can't hide his apprehension with living with someone who looks to be a beautiful girl his own age.

Despite his awareness of analog hacking, Arato can't help himself from being drawn to Lacia. Amid all of this, Lacia is "kidnapped" right in front of Yuka. Arato is upset with the police and their unwillingness to treat this as anything but property theft, so he gets the help of Ryo and Kengo to investigate on their own.

Kouka, the violent hIE who calls herself Lacia's first sister. With her control over the antibody network, she is planning to carry out a horrifying act of terrorism. When Arato learns that her scheme is putting Kengo in danger, Arato sets out to rescue Kengo with Lacia's help.

Arato arrives at the industrial promotion center which is the target for the antibody network's terrorist attack. He heads up the stairs and sees the android politician Mikoto his father developed, which leaves him with feelings of uneasiness. Soon after, the terrorist unit led by Kouka as well as another Lacia-class hIE arrive on the scene. A big battle is about to break out!

Arato manages to rescue Kengo from the calamity at the industrial promotion center. However, even after returning to normal life, he finds himself consumed by the ever deepening mysteries. Meanwhile at the Memeframe Corporation, a factional dispute becomes escalated. Within the upheaval, the Lacia-class hIE Methode is about to make her move.