It's basically self-entertainment, everything comes from JKR and imagination.
Just everyday life at Hogwarts.
Nia Evans: Well, I've only seen The Chronicles of Narnia.
Jennifer: It's okay. I've seen a little bit.
Nia Evans: Why can't I cast a spell? TT
Sirius Black: Isn't that simple?
Jennifer: Nia, you have to be an idealist!
Nia Evans: Why do I make potions according to the book but not as good as you?
Lily & Snape: Understand the subtle differences
Jennifer: Just get used to the talent gap
James: I fly high
Jennifer: I run fast
Sirius: I'm handsomer than you
Nia: My sister is better than yours.