Rei decides to gamble on acting after the arrival of the next Alone. Meanwhile, owing to Himawari's analysis skills, Kenjirou figures out the source of the Alone's power-ups. The next morning, Rei goes to Akane's place to apologize for her behavior 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 (Bacteriophage) 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.