Oh drat, I'm terrible at guessing clues.

AND OMG I DESPISE WHOEVER MADE THESE EVENT ITEMS. THEY ARE ALL SO BEAUTIFUL AND COLORFUL AND SHINY AND I WANT THEM ALL BUT I DON'T HAVE NEARLY ENOUGH MONEY TO GET ALL OF THEM. [/capslockabuse]

EDIT: Also, is there a certain amount of time you have to wait before asking to practice with your goddess? I know it's 30 minutes between each star petition, but is there a time limit between each practice request?