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".
It's rude to people who are 
the same age and are working hard.
هذه وقاحةٌ بحقِّ أشخاص بنفس السنّ
ويعملون بجدّ
Das ist unhöflich gegenüber denen,
die im gleichen Alter hart arbeiten.
¡Es una ofensa
para la gente de tu misma edad!
¡Es una ofensa
para la gente de tu misma edad!
C’est un manque de respect
envers ceux qui font un effort !
È scortese verso chi ha i tuoi 
stessi anni e ce la mette tutta, no?
É cruel com as pessoas da mesma
 idade e estão se esforçando.