Disclaimer: I do not own anything from Koihime Musou, Shin Koihime Musou, or Rurouni Kenshin.

Author's Note: Hello everyone, this will be my first fanfiction. It'll probably be one of the worse you've read since I know nothing about writing a story, nor do I have an imaginative mind. It also likely that I'll never finish this little story that I thought of. After writing this sorry excuse of an chapter, I can truly appreciate the authors of my favorite stories for having such talent with an imaginative mind. Well in any case, I hope you enjoy it!

Chapter 1 – Prologue:

"Hah!" A tall, brown haired teenager yelled out after swinging his shinai for the hundredth time. The dojo hall echoed with his grunts.

"Hey Kazu-pi! Are you done yet?" A spectacled student shouted out into the training dojo of the kendo club.

Hongo Kazuto, forehead riddled with sweat, lowered his shinai and looked towards the doorway. It was his classmate Tasuku Oikawa.

"Yo, why are you here Oikawa?" Kazuto wondered.

"HAH?! Idiot, have you totally forgotten what we're supposed to do today?" Oikawa looked astonished.

Taking off his helmet, Kazuto searched through his bag for a towel to wipe off his sweat. "What do you mean, did I plan to do something with you?"

"Of course you did, you idiot! Remember what that the board chairman gave out homework to every student in this school before winter break?!"

"Homework...? Oh yeah, that's right..." Kazuto slowly began to remember that his school St. Francesca recently had a history museum built on the campus. This is a really prestigious academy, isn't it? "So, we were planning to work on the museum report together, huh?"

"The kendo otaku finally remembers! Well then, I thought we could go there together today." Oikawa grinned.

Looking at the clock, Kazuto saw it was nearly until five. "Well, practice is almost over, so I don't really mind." Kazuto started to pack his armor and guard pieces. "I'm curious though, we still have time to do the report. Why did you decide to go today?"

Oikawa then made a face, which made Kazuto felt really annoyed by. "Well, I just thought, 'might as well invite Kazupi while we're at it!'"

Kazuto looked at the snickering boy suspiciously. "While 'we're at it'? What else were you planning to do?"

"While I'm on my date, of course!"

Kazuto facepalmed at that moment.

"Hahahaha! Hurry up and get changed Kazupi then!"

"Hai hai..." Kazuto didn't feel like going against his friend's enthusiasm.

Moments later, Kazuto and Oikawa walked down the tree-lined path towards the museum, passing by many female students. St. Francesca was originally an all-girls private school, but that changed a couple years before Kazuto became a student there. Needless to say, the majority of the student population were female.

"By the way...who are you even going on a date with, Oikawa?"

Oikawa put one finger on his lips while winking. "It's a se-cret!"

"Psh, there's no reason to keep it a secret from me...It's probably that Serizawa girl, right?"

"Damn it!"

"Or maybe that girl on the swim team that our classmate introduced to you...?"

"Damn it, damn it!"

Kazuto glared at his agitated partner. "What...is it someone other than them?"

"Boohoo...they already dumped me a long time ago!" Oikawa smirked.

Kazuto shook his head. "You know, for a guy who got dumped so easily, I'm surprised you moved on that fast."

"Of course! Why waste these three years of youth moping around?! Love comes first, friendship comes second, and then sex comes third and forever!"

"Yare, yare...what a playboy..."

"Well sure, I am! A Casanova, a Romeo!"

"Well it's not like I don't want to be one as well..."

"Huh, what are you talking about Kazupi? You're surprisingly popular in our school, you know?"

"Wait, what? Are you on something?"

"Tsk, tsk, Kazupi. You're almost as handsome as I am. Also, your grades are good and you're the ace right now in kendo club! Of course you'll be popular with the ladies!"

I don't know about being as "handsome" as that idiot, but it was true that my grades are good. I spent most of my time studying because of my grandfather's strict teachings. As for being the ace of the kendo club, I had to train from a young age to inherit the sword style that was passed down for generations, known as "Hiten Mitsurugi-Ryu". It was a sword style that allowed a single samurai to defeat multiple opponents through near superhuman reflexes and agility and battoujutsu. Because I was training in this style since I was young, I developed an ability to predict my opponent's attacks before it happens, which allowed me to counter attack with tremendous speed. Most of the people in the kendo club only took it has a hobby, so it isn't surprising for me to be better than most of them.

"I'm not that great...though it would be nice to get a girlfriend!"

"Leave it to me, my friend, and I'll help you!" Oikawa teased, trying to cheer me up with a pat on my shoulder, but I twisted my body to avoid it...which caused me to bump into another person.

"Ah, sorry, are you okay...?" Kazuto glanced at the person that he bumped into. He was wearing the same white polyester uniform as they were.

"Tsk." The male student student scowled and walked away without saying anything.

Oikawa frowned. "The heck was with him? He could have said something."

Kazuto didn't reply, still lost in thought. 'That guy's body was a lot muscular than I thought, and he seems to be an experienced fighter, since I can basically feel something from him...'

"Hey Kazupi! What's up? ... Wait a minute...you're looking at that guy's back...you couldn't be...! Kazupi, are you!?"

Kazuto snapped back to reality, "HUH!? What are you talking about?"

"Hey, you were the one..." Oikawa smirked mischievously.

"That's because..." Kazuto paused. There would be no point telling Oikawa about what he discerned from the mysterious boy, and it would just give him a reason to spread bad rumors about him anyway... "Never mind, let's hurry up and go to the museum!"

"Oi, wait for me, Kazupi!"

"Wow, this is a lot nicer than I expected!" The museum was a lot larger than Kazuto expected.

Oikawa sighed, "Only St. Francesca can build such a large museum like this...wonder how much they spent on this place..."

"Looks like millions if these artifacts are authentic."

"Definitely, but our tuition wasn't that much higher compared to other schools. Don't you think that this school may be a little special somehow!?"

"Special...like what?"

"Like for example, maybe our school is actually run by the underworld and the student council is actually a group of devils!"

"...I think I saw that anime a couple days ago..."

"Of course, all stories are based on real things you know!"

Kazuto sighed, "Hai hai, let's get this report done before you sprout more nonsense."

"Psh, flattery will get you no where!"

"I wasn't. Be a little quiet, that guard is glaring at us."

"Hai, hai Kazupi..."

Kazuto and Oikawa stopped at a display of hanging scrolls. There seem to be a large halberd called "The Sky Piercer" hanging on the wall next to the scroll.

"Whoa...this is a pretty long weapon...Sky Piercer...isn't this the name of the weapon used by Ryofu Housen...?" Kazuto stared at the weapon, vaguely feeling an aura emanating from it.

"You mean that overpowered dude in Dynasty Warriors?"

"You do know that they based Dynasty Warriors from The Three Kingdoms period in China 1800 years ago, right...?"

"As expected from the study nerd, Kazupi! I'm surprised you know this much about this stuff."

"...Isn't this common knowledge...?"

"The hell it is, Kazupi! No one else ever bothered to pay attention to History class!"

"I spent most of my time reading history books and training because of my grandpa anyway..."

"Training...training what?"

"My ancestor's swordsmanship style. It was passed down since the beginning of Warring States period in Japan."

"Ah...is that why you're so good at kendo? Although, are you even from this time and age, Kazupi? Most teenagers nowadays would rather want to be the hokage or a harem king..."

"...the hell are you talking about, you weirdo..."

"Just joking around, but seriously, not many teenagers would talk about this stuff."

"It can't be helped, my family is old fashioned since they believe that a son of the Hiten Mitsurugi-ryu can't be weak."

"All you need to do now is wander around, moving around town to town helping others in need and ending your sentences in -de gozaru."

"Huh? What was that? Anyway...it's not like I don't like sword fighting. The training was often tough and sometimes life threatening...but I didn't mind."

"I guess that's why you joined the kendo club in St. Francesca? Because it was fun?"

"I joined because I never sparred with others before beside my grandpa and my father. It was a fun experience since some of the senpais are in the club were good, but they didn't put up too much of a challenge. I guess I should I aim for nationals, I guess?"

"Good luck with that then!" Oikawa boisterously clapped my shoulder. Then in a lower voice, "Hey, isn't that the guy you bumped into earlier?"

Oikawa pointed to a pale haired boy wearing the bright, reflective uniform standing next to an exhibit. He seemed to be deep in thought about the mirror on display, constantly furrowing his eyebrows.

"Oh, you're right. Well, everyone has to do the homework, so I guess he was heading here too."

"Yeah, but I've never seen someone like him at school before. Do you think he's a transfer student?"

"Oh...you actually made a good point for once..." St. Francesca was originally an all-girls school a few years ago, and there were barely any male students here. As a result, most of the males know each other unless they were from a different grade. "Maybe he's from a lower grade or something."

"How mean, Kazupi... but a younger student with such an attitude, it's a bit scary, don't you think?"

"I agree, but he is someone special I think..."

"Special? The hell do you mean Kazupi...wait, you can't be!"

Kazuto sighed. "No, I meant that he's probably a skilled martial artist. I can tell by his stance that he's well trained."

"...When did you become Vegeta, Kazupi? Do you have some sort of power scouter in your eye or something?"

"Anyone who's trained in martial arts can tell roughly how strong a person is. You begin to recognize such things like that from the person's aura and the way they carry themselves."

"You're beginning to sound weirder than me, Kazupi..."

"Oh? You're admitting that you're a weirdo? But, it's strange, there's no way that I would've not noticed someone that skilled at school."

"Psh, all good looking guys can go to hell for all I care. I'll remember to give his picture to the FFF Inquisition squad."

Kazuto smile faintly with a sweat drop on his forehead at his friend's proclamation. He then looked at the unknown student."

The unknown student scowled fiercely as he glared at the mirror. "Here...it begins..." He murmured silently. Kazuto can feel his killing intent rising, causing him to be a lot more wary about the unknown student, who looked like he was about to break down the exhibit.

"Oi, Kazupi. Earth to Kazupi." Oikawa waved his hands in front of Kazuto.

Taking his eyes off of the stranger, Kazuto reverted his attention back to Oikawa. "Hmm? What is it?"

"Stop fantasizing about that boy, you pervert and let's get going to finish the report!"

"Shut up..."

Kazuto began to leave with Oikawa, but he turned back to glance at the display. The mysterious boy wasn't there any more. He tried to shrug off the strange feeling about that guy and then left the room.

Throughout the day, Kazuto began to feel exasperated with Oikawa's ridiculous observations about the artifacts on display such as: "Hey, this was a gigantic pot for memna!", "Don't you think a little girl using this giant flail would be moe?", or "Wow, I bet they had Kamen Rider back then with these butterfly masks!" . Kazuto had to admit that it's probably some sort of talent that Oikawa has if he was able to fantasize like this. After Kazuto and Oikawa finished looking around the museum, the sun was setting. Oikawa began skipping off in the opposite direction towards his date, and Kazuto began heading back to the dormitories.

Kazuto couldn't shrug off the strange feeling he had about that mysterious boy. That amount of killing intent was a bit abnormal at the museum, and Kazuto couldn't tell whether he was actually a student at St. Francesca. If he was a student, then Kazuto would have recognized him immediately. It's obvious that he was one of the strongest people he had seen in his life. Tbere's no way Kazuto would've missed a guy like that.

By the time Kazuto reached the dorm, it had gotten extremely cold. 'I might as well warm myself up with swings...' After dropping all of his bags in his room, Kazuto took out his shinai and stepped back outside and started swinging. The air was filled with the sound of crickets chirping and Kazuto's grunts. He quickly warmed up, and then he decided to head back on the path to the museum. 'I seriously hope I'm over thinking this...but that guy is seriously bugging me...' His father had once said that Hiten Mitsurugi-ryu originally was a sword style to kill people, but shortly after the Meiji Restoration, it developed into a sword style that protects the weak and upholds justice. 'I don't claim to be a defender of justice, but all of those lessons must have made my personality this way...'

'A person can't change himself that easily, I guess, but I must be crazy to be following this weird feeling in this cold...' The full moon shined brightly onto Kazuto shivered. Kazuto paused for a second, as he heard something in darkness. Someone was coming down the path. Kazuto thought for a moment, then decided to hide himself behind one of the trees on the side. His heartbeat had never sounded louder than before. 'Take a deep breath Kazuto...remember those meditative techniques...'

As he steeled himself, Kazuto stepped out behind the tree and called out to the person walking by. 'Now or never...' "Wait right there!"

It was the mysterious guy at the museum. He stopped and turned around, glaring at Kazuto. In one of his arms, there was a large object. The moonlight reflected light towards Kazuto as the guy turned around. 'It's that mirror back at the museum! I was right, this guy was up to something bad...'

"...Who dares stand in my way...? What do you want...?" The mysterious person snarled.

"I don't want anything with you, except for that object in your hands! That's the mirror from the exhibit, right!?"

"..." The mysterious person remained silent, but his killing intent began to rise.

Kazuto, feeling his opponent's will to fight increase, raised his shinai in response. "Why did you steal it? You probably aren't even a student at St. Francesca, right!?"

"And...is that all you have to say...?" The guy swiftly moved and lunged at Kazuto.

Kazuto was able to predict where the strike will land and blocked the strike with his shinai. 'This guy is just as fast as Father.' "Hey, didn't you ever learn that stealing is bad?"

The guy seemed a bit surprised at how easily Kazuto blocked the attack. "You're in my way!" He roared.

Kazuto stepped backward to dodge the incoming attacks. "Hey, what do you think you're doing!?"

As he said that, Kazuto realized that he was trying to aim for his vital spots. 'It'll be bad if one of those managed to connect cleanly on me.'

"I don't care...just die!" The boy began to kick furiously at Kazuto.

'What is this guy...Sanji!?' Each kick was heavier than a sword blow and swift as an arrow. Kazuto parried one of his kicks, and then sidestepped as the mysterious assailant thrust forward with another. 'Time to make use of all of that swordsmanship training!' "Hiten Mitsurugi-ryu – Ryukansen!" Kazuto stepped past the guy, spun around and attempt to strike his back.. However, the guy realized this and jumped forward to dodge the blow.

"Grr...you mongrel..."

"Says the guy who's stealing."

"Stealing, you say...? You mean this..." He lifted up the mirror. "There's no reason for you to need this, so there's no point in trying to stop me from taking it. If you don't want to die, then forget this and walk away now."

"That doesn't even make sense. Don't get full of yourself you thief."

"...What an idiot...I gave you a chance to live and you still insist on interfering with matters that do not concern you. Without the key to open the door, history shall not be rewritten and it will end here..."

"What are you talking about? What key?"

"Enough talk. Die!" The guy launched an attack in all directions. Kazuto instantly knew that he was aiming for his eyes, forehead, throat and temples. Kazuto crouched to avoid the blows to his head, then slashed upward. "Hiten Mitsurugi-ryu – Ryushosen!" Taking advantage of his lower positioning, Kazuto slashed upward attempting to strike his opposer's jaw.

The guy then rolled backwards to dodge the blow, but Kazuto still managed to hit him...or rather he managed to scrape the front of his uniform. The blow caused the mirror to roll out of his pocket, and it flew out into the air.

"Damn...the mirror!" The guy shouted out in desperation, trying to catch it.

"Oh no, you don't!" Kazuto jumped out to catch the mirror as well. However, he collided with the guy and missed the mirror. The sound of bronze and glass shattering echoed into the night.

"You bastard..." The guy grabbed Kazuto by his collar. "How dare you do this to me!"

"You shouldn't have stolen it in the first place, you idiot!"

"You shouldn't have messed with matters that didn't involve you, you imbecile!"

"As if I can leave a thief alone!" Kazuto retorted, but then he noticed a bright light emanating from the shattered mirror .

"Damn it...it has begun again."

The light grew, enveloping both Kazuto and the mysterious guy until Kazuto could see nothing but white. Kazuto tried to move, but his limbs refused to respond. Fear crept into Kazuto's heart. "Damn it, what's going on!?" He couldn't even open his eyes anymore as the brightness was too much for him.

"It's useless...there's no going back, the key has been used." The boy snarled.

"What are you talking about!?"

"Be swallowed by the light, and try to survive what lies next! This is the punishment that has befallen you for breaking the key! Witness the truth of this world with your own eyes!"

Kazuto tried to asked for more information, but his consciousness was beginning to fade...and all was white.