The Samurai and Girl with Aqua eyes

I never got to finish it as anaper2431, so I'll start all over, and it'll be better this time.
A small village in japan has never been harmed by hurricanes, storms, or tsunamis over the years, seeing this on the newspaper makes shy but interested Kiku Honda want to see what's going on. Upon arriving with his loud and enthusiastic friend Alfred, they meet Ella-the only English speaking girl there-and Aqua, a girl from the richest family in the village who caught Kiku's eyes. The more the two outsiders stay, the more Aqua opens up to Kiku, she wants to learn how to fight and he wants to learn why this village is spotless . . . Will Kiku believe what Aqua tells him.