Fred Gideon Weasley was your enemy, you were Rosalind Potter, Harry's older sister since you're the same age as Fred and George, you were George's friend since first year.

You are now in 7th year and you still hate each other. Today, Fred organized a prank for his twin brother, George. The prank involved putting a sticky, slime-like liquid above a door with a rope that would release it when someone walked under it.

You didn’t know about this, so when you walked under the door, the liquid fell on you. Fred burst out laughing even if it wasn't for you, it was even more funnier.

Of course, that didn't shock you that the other students joined in, leaving you completely humiliated by Fred, you looked down at yourself before looking at Fred with pure hatred in your eyes as everyone kept laughing with Fred.