Y/N and hermione granger are best friends. It’s spring break and it’s the middle of the night. Y/N and Hermione share a bedroom and hermione has to pee really really really badly. She’s desperate and then Harry and Ron stop her from getting to the bathroom on time. In this world, Harry and Ron aren’t hermione’s friends.
Y/N and hermione are taking a walk along the black lake when hermione needs to poop. Not diarrhea, poop. She’s struggling to keep her poop inside her body.
Y/N and Harry are siblings. This starts at Privet drive, at the beginning of the third book. Harry just blew up Aunt Marge and we’re on the run. In this scenario, the knight bus doesn’t exist.