Yuyu wants to give Riri a birthday present but doesn't know what to give her. While Riri struggles to find two more members for her legion, can Yuyu overcome her awkwardness and find a way to cheer Riri up?

As Riri and the others continue to grieve, Yuyu isolates herself, tormented by visions of Misuzu. As the Huge attack Yurigaoka as they never have before, Yuyu is forced to question the truth of her relationship to her late Schutzengel.