It was the middle of potions class in 7th year after the war for Harry, Ron, Hermione, Ginny, and Neville, while Snape was walking around, glaring at everybody and only complimenting the Slytherin's since he favored them so much that it made every one sick. When he got to Neville's table, he sneered at him and said "Longbottom, you did it wrong again. The color of the potion is supposed to be red not bright, disgusting pink. ….POTTER! You're sitting next to him, why didn't you say anything to him about it?" "Well I was working on my own potion and wasn't paying attention to what Neville was doing. And besides pink is a very light shade red." Harry said and some Gryffindor's snickered until Snape glared at them all and they tried to cover up their laughter as coughing fits. "Thirty points from Gryffindor for your cheek, Potter" Snape said and continued walking around, judging everybody's potion. After an hour of making the potions Snape said "Stop what you're doing. Now if you dunder-heads were listening before this potion is supposed to make you feel smart. And I'm talking Einstein smart. Now Longbottom, yours will be tested on Potter. Let's see how Longbottom failed at his potion" Snape sneered. Harry and Neville went up to the front of the class and Neville handed Harry the very pink and a little bubbly potion and Harry didn't seem very keen on drinking it but he did any way.
After he drank the potion nothing happened for a few seconds. "Guess it didn't do anything Professor" Harry said. "Don't be so sure Potter. Some potions need to take time to kick in." He sneered. And sure enough Snivellus, ahem, Severus was right, because right after he said that Harry doubled over and cried out in pain. After a few seconds of writhing in pain, he fainted and Ron, Hermione, Neville, Ginny and Snape ran to him, well Severus just walked slowly over to him, and saw him shivering, the greasy professor then said "Granger, Longbottom, Mr. Weasley and Miss. Weasley, help me take Potter to the hospital wing."
When they got to the hospital wing and set Harry down on the bed they watched for more changes. They then saw the changes start: His hair went waist length and turned bright red, his face softened and looked cute, his nose turned into a cute button nose, he grew ample breasts, his lips turned red, full and pouty, which Ginny was trying not to kiss at the moment, his waist turned into an hourglass waist, and his butt turned soft and plump, while his hands and feet turned small, dainty and delicate. After a few hours, she woke up and they saw that her eyes had stayed green but they had a little hazel in them. "W-what happened?" Harry asked. "Well Harry um….it would seem my potion had uh...well….I don't know how to say it.." Neville stuttered. "Oh for Merlin's sake, you turned into a girl Potter!" Snape snapped. Harry was so shocked at that because when she heard that, she fainted again and everybody just glared at Snape for being so blunt and not careful for telling Harry in a subtler manner.
When Harry finally woke up again she looked around and saw Ginny, Hermione, George, Fred, Ron, Percy, Bill, Charlie, Mr. and Mrs. Weasley, McGonagall, Tonks, Remus, Sirius and Madam Pomfrey, who was checking on her. Neville had gone back to the common room when Harry was unconscious. When Madam Pomfrey was done she said, "Well the bad news is I can't find a antidote for what turned you into a girl Mr. uh….Miss Potter. But the good news is that you have friends who love you and will help you during this time." Harry sighed and started to get out of bed and her pants fell off but her shirt hung on her shoulder and covered her enough so nothing was revealed. "Guess I need to go shopping for new clothes." She winced when she heard the squeals of a few girls who were at the hospital wing to see how she was. "I'm not going with the squeal squad though. I'll go with Tonks. Mainly because she has so much style and will let me pick out what I like. Sorry to not include you Mrs. Weasely but you'd just control what I wear. I don't want that." Harry said. Mrs. Weasely laughed and said "I'm not offended dear. I just know that you're telling the truth about that and it is true. I do control what my kids wear but I'm starting to think I should let them be free and let them choose what they can wear since they're of age now." Everybody in the room looked so shocked that they didn't know what to say. Harry then shrugged and looked out the window to see what her new life would be like.