Realizing that Karen will attempt to copy Yuito's gravikinsis in order to access the power of the red strings, Kasane's platoon goes to Arahabaki in an attempt to intercept him, but not before Kasane bids farewell to her sister. Meanwhile, Yuito's platoon attempts to protect their commander from Karen, who proves to be too powerful for them and takes control of Arahabaki, using its cables to restrain Yuito's platoon and forcing Yuito to activate his psionic power that opens a portal to the past. As Karen disappers and Kasane's platoon arrives into the scene, they realize that Karen has caused severe brain damage to Yuito...