Uchi na Gal Sa

Saburou moved to Okinawa with this parents. Wanting to change his gloomy personality, he tries to act like a delinquent, but fails miserably and ends up as a shunned loner. He gets disheartened, but that all changes when he catches the attention of an Okinawan gal named Maya. They skip school and travel around Okinawa, as she drags him along to play with her endlessly! The excitement keeps Saburou on the edge of his seat, and furthermore, Saburou and Maya actually share a secret!

(Source: Kadokawa, translated)