Well, since I forgot it in the first chapter, here is it.

Disclaimer: Harry Potter and Prince of Tennis are not mine. They belong to J.K. Rowling and Takeshi Konomi respectively.

Need I say? Not a first language, probably many mistake, sorry and all that shit.

Chapter 2

Thirteen Years Deaged

6 May 1998, Hogwarts' Infirmary

One day passed after Harry's little freak out in infirmary. Hogwarts' residences had been dying to know the fate of our esteemed hero. Most thought that Harry was mortally wounded and can't escape the evil clutch of the Matron. If someone passed the infirmary and had the urge to peek inside, they would found an adorable scene. Well, said scene was not meant to be adorable.

Time currently was after dinner. A boy, four years old or so, sitting on the bed and glared at who knows what. A glare was not meant to be adorable per se. But when you saw the boy-who-glared was a four years old with a pair of amazingly emerald green eyes, wearing a glasses that was a bit bigger for him, while crossing his arm and grumbled, muttered, and grouched alone, it looked like a pout. Yeah, a cute pout indeed, not a scary glare.

While the boy was busy pouting, err, glaring, the infirmary's door was knocked. "Harry, we're coming in," was heard from behind the door. A moment later, two figures stepped inside the infirmary.

"Hey, mate! How's life? Everything is good, right?" asked a redhead boy nonchalantly. Said redhead was elbowed in the gut a second later. "Honestly, Ronald! Have you no tact at all?!" a bushy haired girl scolded her companion.

"Hello, Harry. How do you feel? Still feeling dizzy?" Hermione asked the little boy's wellbeing. "No, not dizzy. But you know, I've a little, ah, complication." the four years old, which was now identified as Harry Potter, answered.

Ah, right. Meet Harry Potter. His full name was Harry James Potter-Black. The sole remaining member of House of Potter, an old wealthy pure-blooded family, and the inheritor of The Noble and Most Ancient House of Black, an even more older and wealthier pure-blooded wizarding family in Britain. He was born on 31 July 1980, 17 years old. He would be 18 this year, if only the complication didn't happen.

A misspell curse from Augustus Rookwood caused his body to deaged for thirteen years. The curse was supposed to make Harry suffer for thirteen years in continuous pain and agony. Why thirteen? Well, Lord Voldemort spent thirteen years of life in a weaker form, spirit and then humanoid baby, before he regained his body in 1994. It would be appropriate if Lord Voldemort's mortal enemy experienced the same amount of time which his lord spent suffering, the twisted logic of Rookwood concluded. Alas, in the state of his white hot fury, Rookwood misspell the curse. Tredecim annis passionis –which means thirteen years of suffering–, became tredecim annos passionis, thirteen age of suffering. (1)

"Stupid Curse. Stupid Rookwood. Stupid Dumbledore. Why the hell this kind of things always happened to me?" Harry muttered under his breath. His two best friends glanced at each other. They exchanged a 'what the hell we should do in this bizarre circumstances' look.

"Um, Harry, I know that the curse is stupid, and I don't doubt Rookwood is also at fault for misspelling the curse. But, what did you mean by stupid Dumbledore?" Hermione asked, thoroughly confused.

"Well, it's because of stupid Dumbledore and his stupid second chance. Who the bloody hell fought in a war with just a stunning spell?! Why did he just stunned Rookwood?! He should break a limb or two, or snapped his wand!" Harry ranted.

"Urgh, mate, which Dumbledore are you talking about?" Ron getting confused as Harry ranted.

"Both of them!" Harry yelled frustratingly.

"Okay, chill, mate." Ron said as he tried to calm Harry down.

"Hummph!" Harry snorted and turned his head away.

"Aww, so cute!" Hermione couldn't take it anymore and pinched Harry's cheeks.

"I'm not cute!" Harry shouted indignantly.

And so, their teasing and bickering continued until late that night and Madam Pomfrey kicked Ron and Hermione out of infirmary.

10 May 1998, Hogwarts' Great Hall

Peoples gathered in the Hall, having lunch with friends and family, whatever was left after the war anyway. They were jumbled together, nobody was sitting according house anymore. Just yesterday, they held a war memorial for the fallen victims from Battle of Hogwarts. (2)

Now, they were enjoying the delicious Hogwarts lunch, courtesy of its many house elves. Many couldn't help but curiously wondered why there was a kid that looked like a mini Potter, pottering around the Great Hall. (3)

Harry wandered around the Great Hall, and greeted everyone he knew. Not many people knew the truth about Harry, so people assumed that the little boy just had an uncanny resemblance to the boy-who-lived. While Harry was chatting with Luna, someone tapped his shoulder.

"Mr. Potter, if you would come for a moment. I need to talk to you about something urgent." Madam Pomfrey gestured towards the door, intending to talk outside of others' range.

Harry nodded and excused himself from Luna. Some hushed whisper followed Harry as he walked behind Madam Pomfrey.

"Pssst, did you hear that? Madam Pomfrey called the kid Mr. Potter." "What is the kid relation with Harry Potter?" "Don't tell me, the kid was Harry Potter himself." Were some of the things that Harry could hear as he walked outside.

Outside the Great Hall, Madam Pomfrey faced Harry. A regretful look was on her face. Seeing that look, Harry was filled with dread feeling.

"What is it, Madam Pomprey? Is there something you want to tell me?" Harry asked, fearing the worst outcome.

"Well, the thing is, Mr. Potter. . ." Madam Pomfrey said hesitantly.

All that whispers in the Great Hall were still going on even with the little Potter out of vicinity. The peoples began speculated all possibilities that can happened, nosy busybody. And all that whispers were cut by a high-pitched girly, umm, manly scream.

"WHAT?!" All whispers stopped. "What did you mean that my condition is irreversible?!" Shocked, Harry fainted.

Some notes from this chapter, read if you want.

(1) Um, I don't know latin at all. The made up spell comes from typing randomly in google translate.

(2) I don't exactly know the date, of if a war memorial really happened in the story. Just made up the date, giving the family a reasonable week of grieving.

(3) Sorry, couldn't resist the pun.

Presumed all other death eaters captured and imprisoned, to avoid unnecessary plot about death eater hunts a little, defenseless, and small Harry.

Atobe will come a little later. I want to take care of the wizarding world affairs first.

Comment, critic, question, flame, whatever, PM or review me.

Thanks for reading.