America flung the door open widely, smiling happily at the prospect of spending time with Arthur and Alice. Washington D.C strolled in behind him, looking slightly uneasy. The older turned and gave the younger a questioning glance.

"What's wrong Benny?" He asked; blue eyes wide. The other American shrugged.

"I have a feeling on unease. And my name is Ben. Or Benjamin. Not Benny." America rolled his eyes, pushing his spectacles (lovingly named Texas) further up his nose.

"Come on Ben, we've just come for a visit. Nothing can go terribly wrong can it?" He questioned, looking around. "Matthew assured you that Lauren would be fine, now stop worrying and-"

BANG.

Both Americans froze, the large explosion cutting off what Alfred was saying. They turned to each other; dropped all bags in their possession; and ran like the devil was chasing them. They flew down the stairs leading to the English family's basement. America opened the door (read: smashed through it rather violently) only to get a face full of smoke.

"You idiot." A high pitched familiar voice whined. "I told you, small doses make stuff go bang!!"
"Yes, thank you Captain Obvious. I'm new to all of this, thank you very much." A much lower pitched voice retaliated, before letting out a cough.
"Urgh, Iggy? Allie? You in there?" There was a dead silence.

"Wait..." Ben stepped forward, aimlessly groping for one of the siblings. "Alice, speak."
"I'm not a dog you bloody idiot." The male voice responded.

"Alice, are you clothed?" A brief moment of silence.

"Holy hell, I'm a dude. Wait, Artie, have you got any clothes on?" There was another moment of silence, before both Americans dived to the side as the Brits shoved past. They both paused and heard doors slam upstairs. They began to make their way upstairs, when both doors opened again and the two English siblings dived into the opposite persons room. The American brothers shared a pained look as there was muffled yelling and shouting. The doors were opened again and they could here footsteps coming down the stairs. They walked out to meet the other two. Arthur Kirkland and Alice Kirkland... had switched genders. They looked similar to what they did normally, but Washington and America could quite clearly see the differences that now identified London and England. Eng- Wait, no London poked England between the eyebrows.

"Big Bro-...uh, Sis? Umm..." She-He...it...London shook his head. "Weird... anyway. You still got bushy brows!" The older of the Englishmen shook her head, frowning at her younger brother.

"Hey, I'll break your face."
"Pfft, you're a girl, like you could touch me." Arthur lunged at Alice, bringing a fist back. Alice ducked under the fist and pulled Arthur over his shoulder.

"Arthur, you punch like a girl." Arthur flailed, hitting her brother over the back.

"I AM A GIRL YOU NITWIT!" Alice laughed. "IT'S YOUR BLOODY FAULT!" He laughed, ignoring his sister's attempts to hurt him. Suddenly, he paled and put his sister down.
"This is so weird."
"I'll say..." Ben took a hesitant step forward, before poking Alice in the shoulder. He turned to Ben.

"What's up Benny-Boy?"

"My name, Alice, is Ben. Please do call me that. Now... what the fuck happened?" He exclaimed, patting the still shorter English capital on the head.

"Well, Iggy was trying to teach me how to make a potion, and apparently, I 'added the wrong sized doses and made it blow up'." The Americans stared at the English.

"So, how did that make you change gender?"
"Well," Arthur began, blowing a strand of long blonde hair out of her eyes. "Different measures of substances into a certain potion, changes the volume of substances in said potion, thus changing the texture and type of potion that one is making." Alfred sent a look at his lover, confusion clearly labelling his sky blue eyes.

"Arthur, could you say that again in American-English?" England bit her lip, causing America to think dirty thoughts. Don't ask; it happens.

"Basically, not enough makes things go boom." She clapped her hands, rolling her eyes. America then decided to look up and down her body. Arthur had pulled on a pair of skinny jeans, shirt and a tie. She had remembered to but on a bra too. London and Washington shared glances; it was quite obvious how the younger nation was reacting to England's change. Alice rolled his eyes, and pushed Arthur forward. She landed against Alfred's chest and let out a squeak.

"Alfred," America tore his eyes away from England's body to look at London. "I want nothing on my clothes, Iggy's room only." The spectacled blonde nodded before picking Arthur up and throwing her over his shoulder. She squealed as Alfred carried her upstairs, hitting his back. A door slam was heard, and the yelling stopped. Alice turned to Ben and grinned. Ben sighed and rolled his eyes, before taking Alice back down into the basement. He followed and continued to grin.
"Alice, you've got to sort this out."

"I know Ben, I'll sort it out. Trust me, my magic is much different than Iggy's, I honestly don't see why he's trying to teach me." London said, beginning to pick up some different ingredients.

"Let's see... Three eyes of newt... Six frog livers... a dash of pixie dust... and..." He paused, thinking slightly. He shook his head and gathered up the specific ingredients. He lit a flame and placed a cauldron over the fire. London added the items, and stirred them. Ben peered into it, and raised an eyebrow.

"How has that turned to liquid?" He turned to Alice, who paused in her search.

"Magic." He replied, as if it was the most obvious thing in the world. He continued to rummage through the shelves, carefully handling everything. He grabbed a few more things, before turning to the boiling pot. He listed everything off as he added the items.

"Dragon saliva; Leopard fur; Scottish herbs... and..." He plucked a bit of hair from his head and sprinkled it into the cauldron. He carefully examined the outfit he was wearing, and plucked some blonde hair from it.

"A sample of my hair and a sample of Iggy's" He added it and stirred it again, before turning to Ben. Washington D.C looked rather disgusted and slightly amused.

"Ben, I need to say the spell now. Please, try not to interrupt me, or things might go wrong, 'kay?" Ben nodded and stepped back from Alice. He Brit turned to the cauldron and closed his eyes, before lifting a hand to hover over the cauldron.

"Hecto Morsectin." His hand began to glow green, a symbol of the beginning of magic. Ben watched in awe at the sudden power.

"Teleco Morsectin. Jirepi Lerectlim, Poriton Lemeric." The cauldron flashed bright, too bright for the American capital to watch. When it died down, Alice was a female again. She grinned up at Ben, before placing her hands on her hips. Luckily, she had clothes on this time.

"Pfft, and Artie says that I can't do magic." Ben smiled at her, before looking upstairs.

"Has Arthur been changed?" She shook her head.

"Nah, Alfred probably isn't done with her yet. I'll change her back later." She said, smiling fondly. Ben let out a bark of laughter, catching the perplexed look Alice sent him.

"Magic is so amazing. I wouldn't believe if I hadn't watched it myself." Alice rolled her eyes.

"I told you magic was awesome." They both turned around to their respective nations bumbling downstairs. Both looked flustered and they both showed signs of sex hair and swollen lips. Their clothes looked dishevelled, and Alice was please to note that her clothes looked perfectly clean and not stained. The Brit smiled tiredly at his sister, an immensely proud look in his gaze.

"Well done Allie, you changed back."
"Of course dippy, I'm not that bad at magic, now come here." She dragged the older Brit over and held her hands out in front of her face.

"Portion Lemeric, Jirepi Lerectlim." In another flash of blinding light, Arthur changed back to a male. "Rolem Colistic." She muttered, switching their clothes. Arthur gave her a pat on the head, smiling still.

"Thank you." Alfread looked just as awestruck as Ben had. The bell rang upstairs, causing Alice to grin.

"Tea time~!"