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