AN: Yes, I've changed my claim to only Harry's generation couples and not marauder and next gen.
Pairing = Pansy Ron.
To Ron, it seemed like a perfectly normal day. Until he woke up. The last thing that he remembered was Seamus and Dean handing round fire whisky and everyone drinking a lot. His first thought was of surprise, he didn't feel very hungover. Opening his eyes, his second thought was why the walls and bed covers had turned a rather Slytherin green. If this was something that they had done while they were drunk, it wasn't very funny.
Realising he had an early class this morning, he rose out of the bed and starting pulling robes out of his trunk, only to be shocked that they were much better quality than they were before. He could confront Harry about this later, right now he wanted breakfast and for some strange reason everyone else was still asleep with the curtains drawn.
Dashing out of the dorm and into the common room, he wondered how much weirder this day could get. Not only had the dorm been redecorated in Slytherin colours, but also the common room, and, various Slytherin stood around in it.
Pansy Parkinson was one of these Slytherins invading lion territory. When she noticed him entering the common room, her face simply lit up, she came over to him and threw her arms around him, then planted a resounding kiss on his lips.
"You've got morning breath darling," said Pansy, wrinkling her nose slightly.
Pulling away to Pansy's shock, he exclaimed – "What's happening?"
Neither Pansy nor Ron had any idea what was happening; while Ron was slightly freaked out that he seemed to be in the Slytherin common room and he was being snogged by Pansy Parkinson, Pansy was sincerely confused and hurt that Ron was rejected her advances.
"Ronald, what do you mean?" asked Pansy. "What's wrong, you were fine last night."
"Last night I was getting drunk with Seamus and Dean," replied Ron.
Pansy raised an eyebrow, "I don't doubt you were getting drunk with the way you're acting, but with a Gryffindor and a Hufflepuff?"
"I'm a Gryffindor!" pointed out Ron. "They're both Gryffindors as well, Seamus and Dean. Why am I in the Slytherin common room anyway?"
"You've been a Slytherin since the day you were sorted that's why," said Pansy, before her look turned to one of concern. "I think we better get you to the hospital wing."
And, much to Ron's unhappiness, he was dragged to the hospital wing by Pansy Parkinson, wearing Slytherin robes.
And suddenly, he realised what was happening. Not as fast as Hermione would have, but he still realised what was happening. It seemed like during a storm wasn't the best time to get drunk. It had just been this week that Hermione had explained the theory of lightning being used as a catalyst to change universes…