Don't Tell Penelope➳ Percy Weasley x Oliver...
Percy Weasley and Oliver Wood have been butting heads since the time they became dormmates. Unfortunately, it was a horrible match with quiet and studious Percy, paired with the maniacal Quidditch brute Oliver. Often times, the two either ignore each or bicker it out, however, it takes an incident of muddy boots for Percy to finally lose his temper beyond anything Oliver has ever seen. It's more emotion than the boy has ever witnessed come from the boy over the course of attending school together for the last six years.
After losing his temper, Percy expects things to go back to the way they were but they don't. In fact, Oliver is more than well behaved around him, not causing the Head Boy any sort of grief. However, it's during those times, Percy realises that bickering with Oliver was possibly one of his favourite things because it was an excuse for them to talk.
Another confrontation leads to one thing after another and when all is said and done, Percy can only come up with one conclusion right one the spot, his girlfriend, Penelope Clearwater, can never find out about that night.
But it's not that easy.