I don't own any of the characters or Harry Potter.

Chapter 1

Hermione, Ron and Harry sat in the back of the Potions classroom listening to Professor Snape. "The instructions are on the board and you'll work in pairs. Granger-Weasley, Potter-Patil, Malfoy-Parkinson, Crabbe-Goyle, Longbottom-Thomas. Get to work and don't let anything explode." Snape looked sharply at Neville." You have one hour to complete this Ageing Potion." commanded Snape. Everybody went to their partners. Hermione went to get the ingredients while Ron heated the cauldron.

Everybody was done and gone but team Granger-Weasley and team Longbottom-Thomas were still making their potions. They still had 5 minutes time before the hour was done. All was going well until Neville tripped over his feet. Ron, who was holding three unicorn hairs, was pushed which caused the hairs to fall in the cauldron. The cauldron started boiling violently. "Get away" yelled Snape running towards Hermione and Ron to push them away. Because Ron had dropped the ingredient he's already far away from the potion, but Hermione was frozen in shock. Snape covered Hermione just in time as the potion exploded.

Professor Snape's robes were covered in the potion. "Are you okay, miss Granger?" asked Snape. "Yes, sir. Thank you. Are you okay, sir. You got potion over you.""I feel fine, miss Gran-Gr" The professor stumbled and went to grab a chair but faints before he could. "Go get Madame Pomfrey." ordered Hermione. While Dean went to get Madame Pomfrey, Snape's body began to shrink.

"What happened?" demanded Madame Pomfrey as she walked in the room. As Ron was explaining what had happened, the nurse examined Snape's body. "Floo the headmistress and ask her to come to the infirmary. Miss Granger, can you help me move Professor Snape?"

In the infirmary Hermione explained again what happened to the Headmistress. The next hour Severus had potions poured down his throat and spells being casted on him. But nothing worked. "Okay, I did everything I could but I can't get him back to his age. We will have to wait until he wakes to see what the damage is. Miss Granger, can you keep an eye on him while Headmistress McGonagall and I go to St Mungo's to ask for advice." Hermione nodded and went to sit on the chair next to Snape's bed.

For the first time Hermione took in Severus' appearance. Black hair up to his shoulders, pale skin colour, long nose without the crooked part. Maybe he got it when he was older thought Hermione He looks about 17-18 years old. Hermione was so lost in her thoughts that she didn't see Snape moving. "Ugh, what happened" mumbled Snape.

"Well, we were making the ageing potion and Neville tripped and pushed Ron. Ron then dropped three unicorn hairs and it exploded. You were covering me so you took the potion. You fainted and Dean went to get Madame Pomfrey. So now you're here. How are you feeling?" Hermione said in one breath.

"Fine, but why does it feel like I'm shorter, Miss Granger?" demanded Snape. "Um, the potion caused you to de-age. You look like a 17-18 year old."

"What, I de-aged. You can't be serious. Are you and the dynamic duo pulling a prank on me, because it's not funny!" shouted Snape.

"Aah, you're awake. How are you feeling?" asked Madame Pomfrey as she came back into the infirmary. She began to do some spells. "Fine, absolutely fine. I'm a 39 year old trapped in my 17 year old body. Everything is perfect. Did you find a cure?"

"No, Minerva and I went to St Mungo's but they didn't know a cure. There's also nothing in the library. We think it is best that you follow school just like all 17 year olds. Only Mr. Weasley, Mr. Longbottom, Mr. Thomas and Miss. Granger know and they have already been informed not to tell anybody. We will keep looking for a cure but we decided that this is the best solution."

"No, absolutely not. I won't live or learn with the dunderheads. And I don't need to learn anything because I still have my memory. I already know all that they're learning and more." grumbled Severus.

"You will and I won't allow protest. Your new name is Severus Prince. You're the son of Elena and Tom Prince. Their muggles who just moved back here from Bulgaria and you used to go to Durmstrang Institute. Now you're taking your last year here at Hogwarts. I'll leave the details to you to invent so you can remember everything. You will be resorted tonight and you will live as an 17 year old until we find a cure. If we find one. Do you understand?" obliged McGonagall. Severus nodded reluctantly. "Good, now put this uniform on and we will see you at dinner."

McGonagall left the infirmary and Madame Pomfrey went to the office, which meant that they had left Hermione and Severus in an awkward situation. "What are you still doing here, Miss Granger?" demanded Severus. "

"Um, I don't know. I just wanted to make sure that you were okay."

"As you can see, I'm perfectly healthy. So get out or do you want to watch me undress." said Severus. Hermione lowered her head to hide her blushing cheeks and ran out of the door.