Two female prototype androids manufactured using the same chassis for the development of Everroid. The two bodies that had completed the trial period were sold to their respective development agencies. After that, Zion, who was raised as a daughter (Hinako) of Dr. Izumi, who was input with pseudo-memory of human beings, and Sharan (Runa), whose fighting ability was further strengthened by Dr. Kamikaze, both lead different lives.

In the near future where highly developed androids brought big social changes... Anti-android organization rebel against androids and people who support robots. A journalist stands up against the organization with the android Seria whose mission is to protect him. The two fall in love eventually. The journalist is trapped and attacked by robot dog. To protect him, Seria fights the robot and is defeated. Seria is ordered to be destroyed and replaced by her master organization but she fights until with all she got to protect him. What drives her so much... Is it mission or love?