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".
Well, it's also possible to assume 
you're just a lovey-dovey couple.
حسناً، يمكنكما أن تفترضا أنّكما زوجان محبّان
فحسب أيضاً
Positiv gesehen könntet ihr auch
einfach ein dümmliches Pärchen sein.
Pensando en positivo podrían
parecer una pareja de enamorados.
Pensando en positivo podríais
parecer una pareja de enamorados.
Bah, vous ressemblez
à un couple qui aime s’afficher.
O, se la prendiamo in positive, 
di essere una semplice coppietta scema...
Bem, também dá para 
imaginar que é um casal fofo.