Here is the full list of all 14 Sakura Melody achievements.
Accept your first agency gig
Publish your first CD
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
Gain a small following
Gain a huge following
Everybody should have heard of you by now