>>4159275There are multiple elements in this pic that add contribute to it's comfy.
The roudness of all the shapes.
The lack of detail (most people don't realize but more detail detracts from cute)
The soft colors.
The subject matter.
The way nothing over powers anyhing else.
I think you just have to get in a mood where you appricate stuff like this. Watching some good slice of life anime or ghibli can help.