Let this sink in to our craniums:
Yep. Persona Q is definitely a game that isn't for kids. Its in the same category as that of Corpse Party, Shin Megami Tensei 4, and Senran Kagura.
As far as I'm concerned, the whole "M" rating thing isn't just something to tell concerned buyers coughcoughparentscough that this game is going to contain loads family unfriendly content but there are games out there that cover some really mature themes that obviously kids are not prepared for or are too young and ignorant to take seriously such as those in the Persona Games.
Just remembering last year, on the day of May 14, i visited the video game store to buy my own copy of Doom 2016, and there was a kid who was asking his dad if he could get Doom as well. The Dad, not knowing what Doom is all about (because he isn't a real man) tried to talk to the store staff regarding the game and it was pretty cute watching the dad, the kid, and the store staff talk things over on why the kid can't get his copy of Doom. Me being a Man and a Half, I grabbed the last copy of Doom in that store, paid with some $$$$$s, held my copy gloriously, and smiled at the kid who never got his copy of the game >: D