The first time you start Story, the game asks for a difficulty. Pick 2nd Climax, the normal setting. 1st Climax (easy) and 3rd Climax (hard) are also open from the start; ∞ Climax opens once you clear the story on 3rd Climax. Choose 2nd Climax because the Bracelet of Time and Climax Brace 2, the rewards for chapter medals, count medals earned on it (a higher setting may count too, but the guide doesn't rely on that). This run doesn't chase medals; a later section does. The story-clear rewards come on any setting, and pickups, halos and Tears stay on the one file whatever the setting. The other three settings each get a later run in this guide, and you can change the difficulty per chapter from the Chapter Select menu.