Someone Take The Song Astronaut In The Ocean And Rewrite It As Capybara Nap Commotion

So I keep hearing people tell me how great Persona 5 and the entire series before it is, and Persona 5 Royal is free for us with Game Pass, so I’m gonna download it and then probably stare at it a lot while thinking do I really need another astonishingly long game to obsess over so this is my plea to you, Queue — someone please tell me what this series is so I can make an informed decision?