Royals ~Itoshi no Ouji-sama~

Once upon a time, our heroine Himemiya Nagisa remembers meeting a boy who called himself the 'Prince of the White Roses' during a festival, exchanging rings with him after getting lost from her parents. She still treasures that ring, always carrying it with her. While on a ship to her father's overseas home, she accidentally drops it and falls overboard trying to catch it. When she regains consciousness on a strange island, what awaits her? A tale of fate, lost memories, and a new encounter with royalty.