FYI - I am a thirteen year old girl at heart.
I started watching this because I am a child parading around everyday life as an adult. I kept watching because it is SOOO addictive-ly good.
It feels like we are in season 13 because there is so much that happens every episode. I mean you have murder, infidelity, secrets (by-the-by, secrets don't make friends), teacher - student hook-ups, and shady cops and parents.
All I can tell you is do not start watching if you cannot dedicate an hour to watch and the next 6 days to discussing it. I have sucked all of my "adult" girlfriends into it and frankly, they are so happy I did.