it was sixth year for Y/N and Harry. Dark days

It was good to say that Harry's and y/n relationship came with a lot of trouble sometimes. Harry often thought that there relationship was going to end at some point, but didn't want it to. You were best friends with Hermione.

You were in slughorns potions and Harry's been using a book written by the "half blood prince" which had dark spells and potions all over it. You and Hermione were concerned, but Ron wasn't.

"Honestly, harry, you could get expelled for using that book. We don't even know who the half-blood prince is."

"Hermione stop worrying, it's got a bunch of stuff in here that taught me more than snape ever did."

"He sleeps with that book you know, Y/N."

"I know Ron. Seriously though, Harry, let me see the book."

"No," harry said. "I found it."

"Why are you being so secretive?"