Here is the full list of all 13 The Ditzy Demons Are in Love With Me achievements.
Play all routes and view all content
Use Gome's system voice
Reika route clear
All routes cleared
Riria route clear
Yuu route clear
Rin route clear
Arle route clear
First use of panic button
Emiri route clear
Aifa route clear
Miyabi route clear
Start playing Koikuma