Tightly Knit - Fred Weasley

THIS IS NOT THE FULL SUMMARY : No student or professor is deemed safe as the twins have dedicated their fifth year to pranking everyone in the castle. So far, it's been a piece of cake until they attempt to prank Eleanor, the unsuspecting Hufflepuff. At first, they are convinced that it was a simple miscalculation but as the prank, after prank fails, something is up.