After barely escaping from Juuga, the Igarashi siblings learns from Hiromi the truth that he discovered behind the recently fallen scientist's rampage. Despite his worsening amnesia, Ikki ignores his family and Vice's warnings to continue fighting.

What seemed to be Vice betraying Ikki, turns out to be his way of attempting to restore Ikki's memories. However, the restoration of Ikki's memories would mean voiding the contract between the two.

Ikki is worried about Vice's behavior and realizes the true intent of his actions. The Igarashi family alongside the friends they've made along the way watch as both Ikki and Vice come to a "final decision"...