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.

Lacia has a new modeling gig. It is an image commercial to promote a new type of relationship between hIE's and human beings, one in which people view hIE's of the opposite sex as an equal partner.

Ginga Watarai's death puts an end to the incident at the experimental city. During all of the chaos, Arato had revealed his feelings to Lacia which she accepted. Yuka has mixed feelings about this sudden new coupling within her household. Meanwhile, the security police and Lacia-class masters begin to respond to the ever-changing situation.

Pushed by Shiori and Yuka, Arato decided to face Lacia once again. If his last order was still in place, Lacia should be trying to stop Snowdrop. With this thought, Arato heads towards Mitaka, a place which has transformed into an unrecognizable landscape by Snowdrop's power.