At Jonathan's new pool, Marion notices the arrival of a new performer, Rosetta Passel, a diabolo expert. As a fan of her, Sora tries to befriend her, but she displays a perfectionist attitude. Despite one perfectly executed performance, she failed to gain the interest of the audience, and Kalos declines her offer to perform again. Emphasizing her own perfection, she doesn't understand the importance of the audience and runs off. After Sora pleads for another chance, Kalos assigns her as Rosetta's partner and allows six days for Sora to improve Rosetta's performance. Having never performed with a diabolo, Sora learns the skill and ends up teaching Rosetta about enjoyment on stage. After an entertaining diabolo battle performance together, Rosetta changes her attitude and returns home.