Disclaimer : I don't own Katekyo Hitman Reborn but Amano sensei does!.

Vongola Academy

Vongola Academy is an old big school that has all grades, from kindergarten to high school. It has more than hundred club activities and few big fields. The academy also has a dorm and a forest.

A few things about Vongola Academy:

※ Vongola Academy has a one division called 'Arcobaleno Council Student'. They take control of ALL Vongola Academy things.

※ ONLY the Arcobaleno Council Student can take control of: all Vongola Academy properties, student, teacher, club activities and other things.

※ Members of the Arcobaleno Council Student are chosen by Vongola Head principal.

※ The Arcobaleno were already chosen when they were all in kindergarten.

※ Each member of the Arcobaleno Council Student can have only one partner 'till end. The time was free, so they can choose anytime, without worry time-limit. Can't have two or more partner, just only one. So all the Arcobaleno must choose carefully. Also, they can choose someone from Arcobaleno Council Student member too.

※ All Vongola Academy students live in the dorm.

Sawada Tsuna :

A first year student of Vongola High School. She is no good at studying and sports, always called 'DameTsuna' by everyone.

Her face is hidden by her long bangs. She wears an all dark colored sailor uniform and the skirt length is long, it even can hide her knee.

Reborn Arcobaleno :

A second year student of Vongola High School. One of the Arcobaleno Council Student member. Wears a dark blazer and dark pants uniform.

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Vongola Academy

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Chapter 10 : Forever

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Today was a sunny day, the sky so blue and the sun so bright.

The sunlight came through from a few large windows on the 4th floor hidden room, the light shined on the red carpet and the few number of furniture around there made the room look brighter than usual. The room was decorated with red rose motif wallpaper, red wool carpet, a few brown wooden furniture and a few white single doors. The hidden room was so large that it even had 4 other rooms like main room, restroom, bedroom and dining room. Today, I skipped from my lesson and played with my girlfriend (who also skipped) here.

"Muu~ Bel, do you have anything to do to make some money? I'm bored"

"Shishishi, of course not~"

"Tch—- maybe sometime I have to bring you to a host club"

"Oi oi, do you want make money from selling your own boyfriend?"

"As long as people can make money for me, love is already in a different thing"

"You money grabber"

As a usual lovey-dovey(?) talk from us, I enjoyed the calm atmosphere of the room while I polished one after another my silver knives and my girlfriend as usual counted sheet per sheet of money as she already repeated it for twelve times. Bored of it, I started to gaze at my girlfriend and tried to find some game to kill time until the other members would come or the bell of the end lessons rang.

'She's small…'

I thought while I gazed at her softly, not letting her notice that I enjoyed looking at her. My girlfriend is smaller than me, although she is covered with dark color from hood, blazer, short skirt and boots; she also had some white color from her shirt and a revealing snow colored legs, the appearance really showed a girly look.

Unlike in the past…

It made me remember few years ago at that time, when I met her…

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The Mist Arcobaleno Council Student, Mammon.

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It's was when I'm in 6th grade, after I joined the famous top delinquent 'Varia' at Vongola Academy for three weeks. At that time Varia still doesn't have any recognition from the Head Principal and had been chased by the Arcobalenos every day. There was not a day when we were not chased by them, it was always like a war, if we met them we must fight each other until someone went down.

Of course at that time Varia still held an oath and secret to not tell other people the true identities of the Varia members.

Even the Arcobaleno doesn't know in detail about who were the Varia members.

In that interval of time, that time, I met her.

No.

Maybe you can say…,

She 'met' us.

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One day at peaceful Varia base (we use Stanze segrete for it without permission), an intruder suddenly came. Everyone panicked at once, a base, where someone would never easily knew or found the hidden door of room, in this secret room… someone entered that easily really made us be warned at place.

"Excuse me, who is boss of the Varia?" a little heavy voice but also beautiful, asked.

At the middle of room, stood a boy with a black hood that covered half his face and wore a black mantel that reached around the knee with long dark pants under the mantel, almost covering his body with all black.

'Woah~ what's with this brat? All black~'

At that time everyone thought that the kid is boy, not a girl, even me.

"V'U'O'OOO'I'I'I'I'! ! ! ! Who are you huh! ?" shouted the short silver haired girl.

"My name is Mammon, I want to join Varia" said the hood boy.

"Oh my~ aren't you from Arcobaleno~? How did you find us here?" asked Lussuria.

"It's easy find this place with my ability" answered Mammon.

"Hmm~? Wait… just now you said your name is… Arcobaleno Mammon? That famous future top magician?" asked Lussuria again.

"Well, a lot of people call me like that in underground" said Mammon, still calm.

"So you're the real thing huh, what do you want for joining here?" asked Squalo.

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"Salary"

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""""… … … … … … … … … … … … … … … … …""""

Everyone became silent at a second after they heard that unexpected answer; felt that we didn't know how to comment on that, so we just gazed her with a blank mind.

"I heard that you will pay a lot for a member if they can complete every mission and my power can also help you earn lot money, I think it's not a bad proposal for you all" continued Mammon.

"Hmm… it's alright if we pay a lot, but a member also must help earn money and no one of us can smartly do that…" said Squalo while thinking.

"So, you will accept it?" asked Mammon, smiled a bit.

"OF COURSE NOT, we will never accept you! ? You maybe just lied and came to spy on us, we will not be fooled by it you know!" shouted Levi.

"Hmph, say it as you like but I'm here only for money" said Mammon, sighed.

"Ushishishi, does the Arcobalenos not paying you anything, so you can easily betray them freely? That's interesting" finally I said something that was always stuck in my throat.

"Hmm? What is this mushroom head brat?"

"Shishishi, that's rude, I'm a prince you know and aren't you also a brat like me"

"I'm older than you by a year"

"What? But you're smaller than me you know, you're like a black bean, ushishishi~"

"B-Bel-chan~ I think you should stop insulting him you know~ I heard he has a dangerous ability;;" said Lussuria sweatdropped.

"Shishi, as an Arcobaleno maybe I can understand he is strong~ but I can't feel any danger from him~"

"Hahh—-… say it as you like, for at the very least I want to join here, that's all" sighed Mammon and felt a little tired from arguing.

"Well~ how is it boss? Will you let him join?" asked Lussuria.

"Hmph—-… do as you like…" said Xanxus.

"B-b-boss! ! ?" a shocked Levi said.

"Hahh~… as I thought you would say that. Well… welcome to Varia, Arcobaleno Mammon. Even though we said you can join us, we will still keep on eye of you perfectly, you understand?" said Squalo while she sighed and pointed her sword to Mammon.

"Hmph, It's okay since my intention is only your high salary payment"

"Shishishishi~ looks like you really love money huh black bean?" I laughed.

"It's Mammon you mushroom brat, and don't you also look like you love being a fake prince huh?" said Mammon with small smirk.

"I'm a real prince you know~ shishishi, and my name is Belphegor~"

"A name of one the seven princes of Hell, Vanity and Sloth demon 'Belphegor' huh, somehow it suits you doesn't it brat?"

"Ushishi, you also have the name of the Greed demon 'Mammon', one the seven princes of Hell don't you? And it really fits you too~ shishi"

Two of us glared at each other and brought out aura of 'y o u ' r e _ s o _ a n n o y i n g' looks, somehow we felt that will can't have any good reason to be friendly or even just know each other. In the contest of irritated glares between us, suddenly Squalo cut it with her usual large voice.

"Looks like you two can be good partners so I think from now on you two will always be together at every mission, understand?" said Squalo straight.

"W-what! ? are you kidding Squalo, why must I be with this black bean doing a mission?" protested me.

"Since you're the one who's the most junior than everyone, and now you're his senior so don't complain!" said Squalo.

"Tch—"

"I'm also the one who must complain, mushroom prince"

"Hmm… Mammon-chan, excuse me to hug you~" said Lussuria and hug Mammon immediately.

"H-huh—-…?" confused Mammon and just accepts his hug.

"Oh my~ as I thought~" smiled Lussurian, release Mammon.

"W-what you mean…?" ask Levi.

"Nothing, just want to check~ fufu"

"""… … …?"""

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After that Mammon joined the Varia, looks like she really needed a job to make lots of money like us so she joined here.

I'm always partnered with Mammon in every mission for two years, the missions for us was like to get the head of other top delinquents, destroy a group who challenged Varia, sell the goods (drugs, weapons, poisons, etc.) that we get from the defeated enemy to the underground (although after Mammon joined Varia, our funds raised with a high speed three times than usual).

'She really knows how to make us rich… ;;'

In that period of time I realized that she has an amazing ability like to gather information with faster speed than us, get the enemy location with just a slice of paper, make a bunch of enemy faint without moving (I don't know what she did that time). With Mammon beside me, I felt slowly that I love being around her, couldn't have a day without her and I always cling to her even though she might become an enemy in the future.

After a year passed I began grow taller, now Mammon's head only reached to my chest, so small. Somehow I also realized Mammon slowly changed; her body posture, petite waist that sometime showed when her mantel flied, her slim neck that's hidden by her hood and her atmosphere that you now could call pheromone. I was confused a little and tried to explore her body to be sure of what happened, I thought it was okay since I'm a prince~.

"Mammon~"

"Hmm? What's wrong Bel?"

"Prince wants to check your body, so don't move~"

"H-huh—-? ! w-wait Bel, what will you be doing?"

"Of course want to—-… know—… … … …?"

I jumped to hug her at front first to check her body with skin-ship, around of my stomach I felt touched something… … 'soft'…

"U-umm…Mammon… you are a… girl?"

"Yes, have a problem?"

"B-but… you wear pants…"

"I just don't like skirt, it makes my leg cold"

"And you also… don't look like you have a breast…"

"Since it was small"

"… … …"

"So you realized it by now huh, it's so late Bel"

"… … …"

"Until when you will hug me, let go of me"

"… … no"

"Huh—? Do you still need something to check?"

"Yeah…"

"What?"

"Mammon, are you still virgin?"

BUGH

Surprised with the question, Mammon hit my stomach hard.

"OUCH! ! cough-cough- M-mammon, why did you suddenly hit me… –cough-"

"Of course, what's with that question, do you want to die right now?"

"Ushishishi—-…-cough- of course not~ Prince just want to make Mammon become his princess~"

"Huh…? Did you finally become insane?"

"Shishishi~ that's rude, I'm still normal you know~-cough-"

"Then, what did you mean by princess huh? Are you in dream land right now?"

"Of course not~ -cough- I want Mammon to become my girlfriend~"

"W-what? ! Are you crazy, I don't want to become your girlfriend!" shouted Mammon, blushing.

"Why~?"

"N-nothing, I just don't want to make any boyfriend since it would be troublesome… nothing good would come with having lover, all you need in this life is only money"

"Shishishi, that really sounds like you~ but I will not give up since I'm a prince, I will get what I want you know~"

"Mu… that is so unreasonable" said Mammon, still hid her blush.

"Shishishishi, say it as you like~ but I definitely will make you become mine, prepare yourself Mammon~"

"M-muu~… ;;" blushed Mammon hard.

After that I always clung to Mammon every day, even on days without missions, at meals, at missions, when hunting money (only Mammon though), we were always together, I did not let her get far away from me since I'm afraid that she will be taken by someone else. Finally my long effort showed the good result, one day I confessed to her again like I did everyday but she didn't reject it or even ignore it instead she accepted it with a blush.

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-Present-

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Remembering that time again, I was really so happy when she accepted my feelings, I never would forgot about that. Now, at the present I can talk with her like this and she also accept everything about me, I'm really happy.

But… there still only one thing left, that I also wanted after getting her.

"Mammon"

"What Bel?"

"I want to be your partner"

"Aren't we already partnering?"

"Not for mission partners or crazy game partners"

"Then what? Study partners?"

"Prince is a genius, so I don't need it"

"Then, what do you want to be partnered for?"

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"Arcobaleno Partner"

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"… … …!"

Mammon slowly raised her eyebrow as slowly repeated Bel words against her brain, she froze and just stared at him with surprise.

"Are you sure…?Did some of the knives wrongly flew to your head?"

"I'd be already dead if the knife really stabbed my brain, shishishi~" joked Bel.

"Then what? You must have known if you become a partner of an Arcobaleno, you wouldn't be able take another step back again, you must be beside your Arcobaleno until death, even if you run… the other Arcobaleno member or our 'curse' would hunt you 'till end of world"

"Shishi, I know it perfectly"

"You also can never leave me for another person, never be freed from me, you might not even have a normal family with me and you still really want it?"

"Yes"

"… …Idiot…"

"I'm genius, not an idiot~ so a prince will 'take' his own princess forever, like in a cage~ Shishishi"

"Idiot"

"Prince is not an idiot~"

"Idiot is an idiot, nothing else than that"

"Shishishi, that's rude~"

"Mushroom head"

"I'm not mushroom head~"

"Fallen prince"

"Why did the insults become sharper…?"

"Are you… really sure about that?"

"Yeah, since that was what I hoped, shishishi"

"… … … … …Belphegor…"

"Hmm~?"

"Thanks"

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"Ushishishishi~ that doesn't sound like you at all Mammon~"

"S-shut up"

"You're really really super cute Mammon—-"

"Mugya? !"

I landed my lips immediately to her hood and slowly pulled the hood to reveal her cute face, continued it, next I kissed her lip lightly and repeated it again few times, as I satisfied then I landed my lip to her white neck and heard Mammon moan a little but I ignored it and continued to feel the warmth of Mammon. My free arms embraced her softly as I treasured her, careful not to break her, I stopped the kisses and felt her warmth as I enjoyed it.

"Mammon, you're really warm~"

"O-of course, since I'm a living human being you know"

"Shishishi, then~ do you also feel warmth from me~?"

"… … … … Yeah…"

"Ushishishi~"

Still hugged her I let her sit on my lap, enjoying her warmth, her scent, her soft touches and her small body, I can't resist all things about Mammon (except money cases). I locked her inside my arm… and hoped that from now on and 'forever' Mammon would still be beside me.

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'Even if she's trying to run away from me—-…'

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'I will always lock her in my 'cage''

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End.

Chap. 10 is up~ finally done XD; ;~! ! ! it's little hard to write how Mammon and Bel interaction^ ^;. somehow I also get felt wrong way to expression of 'Arcobaleno partner rule of Vongola Academy' -_-; it done with hyperbola expression than I think...; next time I will try to find more correct word to explain it;;

Anyway, thank you so much for all review! ! I'm really so happy XD/ / /~! Thank you for read! ! and I also draw Rebornxfem!Tsuna fanart(normal), if you have time, enjoy to look it :D~ (you can see the fanart link at my profile)

Enjoy~ and please review~ ,

Thank you

.pianno

Edited by my beta reader, Aerin02.