Unlocking ''Omake'' or ''Extras'' Menu
After winning the World Queen Contest, there will be a new menu in the Title Screen. It's the most lower one called Omake. You can make a new character here and play it in your save game. After creating a new character, the next time you continue, there will be a new option. The upper one is to play with your original character. And the bottom one is to play with your Extras character.