Here is the full list of all 14 Sakura Melody achievements.
Publish your first CD
Gain a huge following
Gain a small following
Accept your first agency gig
Nail your first stage performance
What a live performance
Appear on a TV show
Win the idol competition
The Protein Princes win the competition
Achieve Akko's ending
Achieve Ibuki's ending
Achieve Chiyoko's ending
Achieve the Harem Ending
Everybody should have heard of you by now