Himekawa is a guilt-stricken by her failure to protect the citizens as they boarded the Tokyo megafloat.  When a mysterious radio signal is picked up by Atraxia, she leaps at the change to perhaps finally save a civilian.  But when Amaterasu arrives at the source of the signal, they find an enemy from another world, and one deeply connected to Himekawa's past.
It's true that I haven't really done a 
Heart Hybrid with Himekawa yet.
Ja, ich habe mit Himekawa immer noch
kein richtiges Heart Hybrid durchgeführt.
Es cierto que aún no hago
el Heart Hybrid con Himekawa.
Es cierto que aún no he hecho
 el Heart Hybrid con Himekawa.
On n’a toujours pas réussi
de vraie transfosexion, avec Himekawa.
Ha ragione. Io e Himekawa
 non abbiamo ancora completato un Heart Hybrid.
É verdade que não fiz um Heart
 Hybrid com a Himekawa ainda.