A huge enemy fleet is bombarding Atraxia, led by a battleship with a gigantic cannon. Amaterasu does their best to fight them off, but Aine's Hybrid Count is critically low.  Kizuna is able to rescue her in the nick of time and take her back to Ataraxia, where he talks with her about her past.  He finds out that Aine was also a test subject in Dr. Nayuta's experiments, and that she knows the key to unlocking her lost memories: a more advanced version of the Heart Hybrid called the Climax Hybrid.
I was the only one who could use
the Heart Hybrid Gear back then.
Damals war ich die Einzige,
die die Heart Hybrid Gear benutzen konnte.
En esa época, era la única
que podía usar el Heart Hybrid Gear.
Entonces era la única
que podía usar el Heart Hybrid Gear.
À cette époque, j’étais la seule 
à pouvoir piloter un Gear.
Allora ero l'unica che poteva utilizzare
 l'Equipaggiamento Heart Hybrid.
Eu era a única que podia usar 
o Heart Hybrid Gear na época.