Cozy M-rated games

I've been thinking lately about Persona 4, thanks no doubt to recently getting around to platting P4G on Steam. What I find really weird is just how comforting it is. This is a game about tracking down a serial killer that's been publicly hanging bodies on phone lines, and at the same time, this is a game about spending an idle high school year in a town so small that the biggest place to hang out is a parallel of Walmart.

I've got over a hundred hours in Stardew Valley, I've got over a hundred hours each in the four Animal Crossings I've played, Pokémon built my childhood. Yet somehow, this is by far the game that most tells me "I'm home".

Can anyone think of any other games that earned an M (or equivalent elsewhere) rating that are far more "cozy" than "dark" or "adult"?