Here is the full list of all 14 KumaKuma Manga Editor achievements.
Create a custom role
Create 10 custom roles
Use software for 20 minutes
Use software for 60 minutes
Use software for 10 hours
Use software for 24 hours
Create a custom expression
Create 10 custom expressions
Create a custom pose
Create 10 custom poses
Use Two-Roles Pose
Drag in a 3D Background
Use depth of field button
Finish one page of your Manga