March 14, White Day - According to the internet and encyclopedia, it's a day when guys who have received chocolates on Valentine's Day must return candies or white chocolate to those whom he received chocolates from a month ago. On the way to Shimoda in Izu, Nishizawa-san already told Hayate that he doesn't need to get her anything but of course, on the day of, she was hoping to receive something from him. As for Hayate, he was still going to get Nishizawa-san something but didn't know what to get when he consulted some of the gals...
I'd imagine you'd feel on top of the world
if a boy you like gave you those.
Seguro que cualquiera se alegraría 
si un chico le regalara esas.
Você se sentiria no céu se um garoto que 
gostasse de você te desse isso de presente.