Unlock the following options at the main menu by performing the corresponding tasks:

OPTION - HOW TO UNLOCK
After Story option - Complete the main storyline with eight or more orbs of light.
Alternate main menu - Unlock the true ending in After Story mode.
Orbs of light in main menu - Each orb of light collected during game play will appear at the main menu.
CG mode - Collect at least 1 orb of light in the main story and complete the Arc.
Music mode - Collect at least 1 orb of light in the main story and complete the Arc.