The boy who Hayate meets is revealed to be Wataru Tachibana, Nagi's fiancé. However, Nagi and Wataru can't stand each other.
I think Isumi probably headed 
for that so-called subway, but...
Imagino que Isumi habrá ido 
a ver el famoso metro, pero...
Eu acho que a Isumi deve ter 
ido rumo ao metrô, mas...