The boy who Hayate meets is revealed to be Wataru Tachibana, Nagi's fiancé. However, Nagi and Wataru can't stand each other.
I have ridden the Orient Express 
and the Siberian Express, but...
He subido al Orient Express 
y al Siberian Express,
Eu já viajei no Expresso do Oriente e no Expresso 
Siberiano, mas nunca andei de trem no Japão.