It turns out that Glass, like L'arc, is also a hero from other world. Naofumi barely fights off their combo attacks and then corners Glass in a one-on-one battle, but is then faced with an all-important question: does he truly wish to protect this world?
they must defeat heroes in 
another world. Namely, us.
يجب عليهما هزيمة أبطال في عالمٍ آخر. أي نحن
deben derrotar a héroes
de otro mundo, es decir, a nosotros.
deben vencer a héroes de otro mundo,
es decir, a nosotros.
eles precisam derrotar os heróis
de outro mundo, ou seja, nós.
им нужно одолеть…
Героев из другого мира — то есть нас.