The boy who Hayate meets is revealed to be Wataru Tachibana, Nagi's fiancé. However, Nagi and Wataru can't stand each other.
Besides, we may get to see 
subterranean people or living dinosaurs!
¡Además, quizás podamos ver gente 
subterránea o dinosaurios vivos!
E quem sabe eu consiga ver alguns 
habitantes subterrâneos ou dinossauros.