The boy who Hayate meets is revealed to be Wataru Tachibana, Nagi's fiancé. However, Nagi and Wataru can't stand each other.
In other words, it's something 
our families decided on their own,
En otras palabras, es algo que 
decidieron nuestras familias,
Em outras palavras, isso é algo que 
nossas famílias decidiram, então...