A/N READ THIS FIRST

Okay, keep in mind that from now on, I will refer to Marui as Niou, and Niou as Marui. But when someone who DOESN'T know they've switched is talking, they mean who they see. So, if Yagyuu says "Niou", he means NIOU, but doesn't know that Niou is actually Marui.

Another exception is when I use a full name. Niou Masaharu is NIOU, and Marui Bunta is MARUI.

Again, MARUI=NIOU, and NIOU=MARUI whenever it's not someone talking.

Chapter 2

"So, Niou-senpai and Marui-senpai have switched minds? How?" Kirihara asked curiously.

"Must be that stupid juice that Yanagi gave me. I swear, when I get back to my own body I will prank him until he regrets ever living…" Marui grumbled. Sighing, Niou looked at the mirror in the washroom they were in. It was horrifying.

"Well, we better go back and tell Yukimura-buchou about this. I don't want to be you forever." Niou whined. Suddenly, Marui grabbed his wrist. Niou's head snapped back to look at him.

"Actually, me and Yagyuu do something like this pretty often. Except, we don't really change bodies. It's more like we act and dress as each other." Marui explained.

"Your point?"

"How about we do the same thing, except with you and I? It's even easier in a way! Now we don't have to worry about people finding out because I'm much taller than you." Marui continued. Niou gasped. "No," he objected, "I will never be you! And I don't want to be you! Sanada-fukubuchou always assigns you extra laps, meaning that I won't have time to eat sweets!"

"You can't eat sweets anyway. Besides, you're in my body now, and I rarely eat anything high in sugar. If I'm right then you'll even skip meals sometimes." Marui remarked. Niou stared in horror.

"Look, just do this for a week, okay? After that we can tell everyone that we've 'switched', and Yanagi can find us a potion to get us back to normal."

Niou looked hesitant.

"F-fine, but we'll be found out within the first day! I'm not good at acting!" he exclaimed.

"Aww, is our tensai scared that he can't even act?" Marui teased. Niou glared.

"Fine, I'll do it! And I'll be a better you than even you can be!" he declared.

Kirihara had returned to the tennis courts right after he was able to confirm his senpai-tachi were switched. His first thought was I should tell everyone what happened! But then he realized that Yanagi-senpai was giving him a strange look, and he got the feeling that he wasn't supposed to say anything.

But, he was incredibly confused when the two showed up a while later, acting exactly like who they looked. Niou-senpai was smirking, and Marui-senpai was chewing bubblegum.

"Are you two alright?", Yukimura asked in a concerned voice, "Did it taste that bad?"

The two nodded furiously, until Marui (Niou, remember) nudged his arm, signaling that Niou Masaharu doesn't nod furiously. Niou (Marui, remember), realizing, quickly switched to an annoyed glare, and Marui nodded in approval.

"Tarundoru! 30 laps for being late, both of you!" Sanada barked, and Marui and Niou rushed off to run around the court while the other regulars pondered on their actions.

"It is not in Niou-kun's behaviour to nod like that. He seemed to be acting oddly." Yagyuu told them. The others had similar thoughts.

"Perhaps it's just Niou being weird. Marui seemed normal. They'll be fine soon." Jackal replied, and urged the practices to continue so that he could face Yagyuu in a singles match.

Marui, while running, had heard this. "See, Bunta, I'm a much better actor than you are." he teased.

"Shut up! Just because you managed to fool Jackal, doesn't mean you got my personality correct! I don't just chew gum, I blow bubbles with it!" Niou shot back in an annoyed voice. Nodding, Marui shaped the gum over his tongue, and prepared to blow.

"You've got to be kidding me. I am NOT taking it this far!" Niou said stubbornly, his arms crossed over his chest. They were done changing, and as much as Niou hated it, Marui had forced him into wearing his uniform.

"I'm about a size larger than you," Marui had explained, "So your uniform won't fit you anymore. Yagyuu and I are the same size, so it's a different case then."

"Fine, I'm okay with the uniform. But now we have to go to each other's houses instead of our own! I don't want to spend a week living in your house! It's probably covered in traps and stuff!" he protested. Marui chuckled. "It's not that bad. Besides, I've had to eat more sweets in this past hour that I've eaten in a year. Only my sister will be home, and with any luck, she'll ignore you."

Niou's expression softened. So Niou Masaharu rarely saw his parents? If that was the case, then he'd be surprised when the Marui's ate dinner together everyday.

"…Fine. But the moment I see anything weird, I'm blaming you!" he confirmed with a glare.

Marui chuckled again and gave Niou the address of his house, with Niou doing the same afterwards.

Niou glared. This just wasn't his day!

On the way there, he had accidently missed a road and ended up having to walk twice the distance to make up for his mistake. Then he realized that he couldn't read a few streets on the map due to the fact that Marui had written it in a hurry. This made him stomp angrily on the ground, and then sigh.

Niou reached into his pocket to pull out the cell phone he usually kept in there. Of course, it was no surprise to find that it wasn't there. He was in a different body, after all.

Cursing his misfortune, Niou looked through his bag in a futile effort to find something he could communicate with. This day seemed to be getting even worse. Now he was stranded on some random road with no way to communicate and no telephones nearby. Well, he could always knock on some random door and ask to use their telephone…

So that's what he did. After a bit of thought, he ran up to the house on his left and rang the doorbell impatiently. He was surprised at what happened when the door opened.

"Oh, Masaharu, you're home. Why didn't you just use your key? I was in the middle of sleeping." a girl about 22 years old, complained.

"R-right, I forgot. Um….. sis, this is where I live, right?" Niou asked awkwardly. Hey, for all he knew, this girl who claimed to know him could be a childhood friend of something.

"Don't be silly, of course it is." the girl glared, "Now are you going to come in, or will we wait until all the cold air wafts in?"

Niou hurriedly rushed inside the house before he angered his "sister" anymore. His eyes widened at the sight.

It was a beautiful house. He didn't notice at first, but it was large on the outside as well. A large hallway welcomed them with warm colours, and each room was unique and elegant. However, when he hesitantly wandered up the stairs, he noticed that the rooms upstairs were more creative, with each of the rooms having a different colour theme.

Great, Niou thought, which room is supposed to be mine? I'd look like an idiot if I asked…

He decided to check every room, opening 5 doors before finally opening one that looked like something Niou Masaharu would sleep in. The walls were lined with shelves of books and tricks, and there was the occasional paper full of possible pranks stuck on the wall. Niou stared in wonder at the room the school's trickster lived in.

The bed was large and inviting, but it paled in contrast to the other parts of the room. The bookshelf was something that surprised Niou the most. Everyone knew that Niou Masaharu wasn't a complete idiot, but he would have never expected to find books on advanced math in his room.

What interested him more, however, was the shelf on the opposite side of the room. It had many hand-made books, and Niou couldn't help but pick one randomly off the shelf.

The title startled him. "How to act like Niou Masaharu", it read. Like it was reading his mind.

Putting the book aside, Niou decided to explore the house another day. It was already 10 o'clock in the night, and the events of the day made him confused and worried. He changed quickly into what looked like pajamas, and turned off the lights before jumping into the bed.

A/N Ok, that was confusing, right? Just remember that for the part of when Marui enters Niou's house, Niou=Marui. Again, full names mean who they say.

For some reason, Niou has always struck me as either a rich boy with family problems, or a poor boy with family problems. I kind of prefer the former, and no one knows how Niou's house looks like, so let's just say he's rich in this fanfic, okay?

I'll be updating again soon ^_^