Roman Holiday (MIZUNO Hideko)

(from ebookjapan):

This is a love story set in Rome about the heartbreaking love between a beautiful princess, Anne, and a newspaper reporter, Joe.

Anne, a princess of an old royal family who was on a courtesy visit to various countries in Europe, explodes in frustration in Rome, Italy, due to fatigue from her overcrowded schedule.

Anne decides that she has had enough of her life of drudgery and escapes from the palace. When she falls asleep in a piazza, she is rescued by Joe, a newspaper reporter passing by...?