Here is the full list of all 48 Kawaii Deathu Desu achievements.
Unlock Elysa Idol
Get 11000 souls with Emmy
Unlock Mary Idol
Get 3500 souls with Emmy's skill
Get 7000 souls with Emmy
Get 3500 souls with Emmy
Unlock Suu Idol
Finish all Shows in KDD
Get 11000 souls with Death-chan
Get 7000 souls with Death-chan
Get 3500 souls with Death-chan
Unlock Emmy Idol
Get 800 souls in one show
Get 365 Scores in the First Show
Survive 5 Shows in the Game
Get 20 fans souls in one match
Listened all music KDD
Get all KDD shows
Get 9 Idol's skins
Reach the maximum level with Death-chan
Reach the maximum level with Emmy
Enchant 3500 fans with Suu's skill
Enchant 5000 fans with Suu's skill
Get 3500 souls with Suu
Get 7000 souls with Suu
Get 11000 souls with Suu
Reach maximum level with Suu
Get 3500 souls with Mary
Get 7000 souls with Mary
Get 11000 souls with Mary
Reach maximum level with Mary
Burn 3500 fans with Mary's skill
Block 1500 fans with Elysa's security
Punch 1500 fans with Elysa's security
Punch 1500 fans with Elysa's big security
Use Elysa's big security skill 10 times
Get 3500 souls with Elysa
Get 7000 souls with Elysa
Get 11000 souls with Elysa
Reach maximum level with Elysa
Unlock Abigail Idol
Get 5000 souls with Abigail
Get 3500 souls with Abigail
Get 7000 souls with Abigail
Get 11000 souls with Abigail
Invoke the trio Abigail's puppies 5 times
Use Abigails's skill cat 10 times
Reach the maximum level with Abigail