As Rei stakes everything on the arrival of the next Alone, which she plans to power up using her remaining arrows, Kenjirou learns of the source of the Alone's power-ups thanks to Himawari's analysis skills. The next morning, Rei goes to Akane's place to apologise for her behaviour the other day and is invited to have dinner with her and Momo. Meanwhile, Kenjirou tells Yuuri about how the Alone are linked to the accident that occurred seven years ago. Rei enjoys the evening as she has dinner, takes a bath and spends the night, and hears from Akane as to why she wanted to become her friend, making a promise that they'll stay friends. The next day, after Rei goes off on her own and Akane and the others are informed of a strategy to pinpoint the source of the arrows, another Alone appears, which Rei powers up with another arrow. Before she can fire anymore however, she is located by security droids and is forced to retreat, allowing Akane and Wakaba destroy the Alone. As Rei becomes cornered, she is discovered by Akane, both becoming shocked upon learning of each other's identities. Jumping to the conclusion that Akane knew her identity from the start, Rei feels betrayed by Akane, believing her wishes of friendship to be a lie, before she is captured by the military.
何度となくアローンの襲撃を阻まれたれいは、次のアローンに全ての力を使い示現エンジンの破壊を決心する。
少しでも手がかりをつかむためにあかねの家を訪れたれいは、あかねの素直さにふれ、自らの想いを打ち明ける。
一方、健次郎とひまわりはアローンが強化された瞬間に何が起きているがをつきとめすることに成功した。
そして、現れたアローンを追って行った先であかねが遭遇したのは…。
얼마 남지 않은 화살을 다음 아론에게 모두 쏘기로 결심한 레이는 후회를 남기지 않기 위해 아카네의 집에 찾아간다.
아카네는 이 사실도 모른 채 레이와 계속 친구가 되고 싶었다며 레이를 반기는데...
한편, 히마와리는 아론 폭주의 원인을 해명해 내는 데 성공한다.
Mientras Rei apuesta todo a la llegada del próximo Alone, que planea potenciar con las flechas que le quedan, Kenjirou se entera de la fuente de los potenciadores del Alone gracias a las habilidades de análisis de Himawari.
