Many years have handed since Naota and Haruhara Haruko shared their journey collectively. Meanwhile, the struggle between the 2 entities generally known as Medical Mechanica and Fraternity rages throughout the galaxy. Enter Hidomi, a younger teenaged woman who believes there’s nothing superb to count on from her common life, till in the future when a brand new instructor named Haruko arrives at her college. Soon sufficient, Medical Mechanica is attacking her city and Hidomi discovers a secret inside her that would save everybody, a secret that solely Haruko can unlock. But why did Haruko return to Earth? What occurred to her Rickenbacker 4001 she left with Naota? And the place did the human-type robotic “Canti” go?