After the battle inside the Ziggurat, Chizuru and Hayate are horrified to find out that their victory would have cost Koyori her life. They agree to help Tazuna and Koyori, even though they're out of the fight now.  They tell the two of them that in order not to be found in the real world, they need to come up with a name to use inside the Ziggurat when they fight.  After a bit of thought, Tazuna and Koyori's new name becomes "Single Gear".
The man who stands in the path of their run
الرجل الذي يعترضُ طريق مسيرهما
Der Mann, der ihnen im Weg steht,
durchsticht das Herz des Jungen.
El hombre que se interpone en su camino
clava un puñal en su corazón.
El hombre que se interpone en su camino
clava un puñal en su corazón.
L’homme qui barre la route au garçon
lui apportera le regret.
L'uomo che sbarra il passaggio
O homem que cruza o caminho