y/n,yuma,issei,kala and papy arrived at the school gates. Yuma and kala had a polite smile and looked shy wich issei found cute (makes sense because he's a pervert). And papy was shooting glares at Yuma, y/n noticed this and asked.

y/n: PAPY ARE YOU OKAY!?

papy: *lying* yeah bro, I'm fine.

motohama: hey issei...sooooo... who's the chick

issei: oh hey dude this is kala my girlfriend and the girl with the black hair is y/n girlfriend

kala and yuma: its nice to meet you

they bowed in a polite manner

the two were suprised by the news

motohama and mutsuda: no way you guys got girlfriends!

y/n: AND SHE ASKED ME OUT ON A DATE!

motohama and mutsuda: you Lucky sons of a b-

before they could finish there sentence papy glared at them.

motohama and mutsuda: biiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiscuits

y/n: BISCUITS! I LOVE BISCUITS

Yuma: it was nice meeting you tree. but I and kala must go

Yuma gave a kiss on the cheek and kala did that to but with issei. they bowed down and ran off.

motohama and mutsuda: traitors!

y/n and papy were walking to there class. but papy coulnd't think.

papy: Yuma mark my words, if you make y/n sad you will have a bad time 

timeskip  this  is thinking

papy and y/n were home.

this is there home hope you guys like it ps there are rich

papy and yn were in the livingroom.

y/n was asking for advise from papy for his date.

y/n: PAPY! WHAT DO YOU THINK I SHOULD DO!?

papy: hmmm, perhaps you could take her to the mall

y/n: THAT SOUNDS LIKE A GREAT IDEA! THANKS PAPY!

papy: heh, your welcome bro 

y/n went upstairs to dress up for the date. while papy made a plan to keep y/n safe.

timeskip brought by chibi y/n and yuma beinging spied by chibi papy

y/n waiting for Yuma in his outfit.

until he saw issei.

y/n: HEY HUMAN! ARE EXITMENT BECAUSE I AM!

issei: yeah dude totally

y/n and issei waited for Yuma and kala to arrive. while waiting a girl with a bat themed costume walked towards the boys and handed them a flyer.

?????: here have a flyer cutie *Winks to y/n*

 y/n: THANK YOU HUMAN

issei and y/n looked at the flyer and it had a weird symbol on it and some roses and two nude girls on the corners

issei and y/n: your wish will be granted

????: issei!

????: y/n!

the boys then looked at the source of the sound and it was Yuma and kala.

Yuma: sorry we kept you guys waiting

y/n: ITS ALRIGHT HUMAN

kala: yeah sorry, you boys ready for our double date

issei: I'm ready

y/n: I'M READY HUMAN

they then went to the mall for the date and everthing was great. Yuma,kala,y/n and issei were browsing some stuff at the mall until y/n saw something and he decided to buy it.

and when y/n got back Yuma asked him.

Yuma: so what did you buy there

y/n: CLOSE YOUR EYES HUMAN. ITS A SUPRISE

she then closed her eyes and y/n got the necklace out of his hands.

y/n: OK YOU CAN OPEN YOUR EYES HUMAN

and when she opend her eyes she was captivated by the beauty

 Yuma: awww...this is such a beatiful necklace

y/n: ITS SO MUCH MORE THAN A NECKLACE HUMAN. ITS THE KEY TO YOUR HEART

Yuma then blushed

Yuma: your so sweet

y/n: THANK YOU HUMAN

Yuma: can you put the nacklse around me

she then lifts her hair and y/n takes the clasp and wraps the necklase around her neck, reeling it back and hooking the clasp

Yuma: so...what do you think

y/n: ITS SO PRETTY ON YOU HUMAN

Yuma: ahh, thanks

kala,issei,yuma and y/n were sitting in the cafe. kala got chocolate icecream, issei got japaneese thea, Yuma got vanilla ice cream and y/n was eating a stawberry crepe. y/n then took a bite.

Yuma and kala blushed because its was so adoreble.

timeskip brought by chibi Yuma blushing when chibi y/n eat

after a long day kala,yuma,y/n and issei decided to took a walk around the park. they took a nice stroll around the fountain which was in the center of the park

Yuma: i had so much fun today y/n

kala: yeah it was great issei

y/n: ME TOO HUMAN

issei: yeah same hear

Yuma gave y/n a hug and ran to the fauntain with kala. they faced the boys

kala: I have a question for you two

issei: what is it kala

Yuma: would you guys...die for for us

y/n: CAN YOU REPEAT THAT HUMAN

kala and Yuma: would you guys die for us

they then laughed maniacally and Yuma clothes transformed into a way revealing outfit...looks like leather armor with some chains and spikes

y/n and issei took a step back as they summons two glowing spears. kala looks cold to issei but Yuma looked at the necklace and grabbed it gently and looks at y/n.

Yuma:I'm sorry that it has come to this y/n

Yuma made a spear and trew it at y/n.

papy: Y/N!!!!!

before she could do anything the spear made a giant mark on his stomace.

like the genocide run

y/n: w-well. that's not what I expectes...but...st...still...I believe in you! you can do a little better! even if you don't think so! I...I promise

he said crying but smiling happy

like this

he fall on the ground and looked at his crying sister and said.

y/n: goodbye...sister...

y/n was lying on the ground ... dead. papy's fists are clenched. her eyes closed but are raining down tears. her face looking down to the ground. a orange fire rising from the left side of her face, originating from her left eye. the girls finally notice her and look at her with worry and fear.

Yuma: p-papy

she asks shakely, papy looks to the girls with dead in her eyes.

and on that moment they new

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

they fucked up.

papy: it's a beautiful day outside. birds are singing. flowers are blooming... on days like these...people likeyou ... should be BURNING IN HELL! YOU DIRTY BROTHER KILLER!

she yelled as her left eye burned with orange fire as she launched her hand to the left, making Yuma be coverd in a orange aura and flying where her hand went, straight into the fountain breaking it. she picked her up with her powers and raised her into the air and back into the stone beneath them. she flicked her left wrist and bones shot from the ground and stabbed yuma in the arms and legs making her scream.

papy: you know, I never understood why people never used their strongest attacks first. but I can't be one to talk

she said as she snapped her fingers and a large floating gragon like skull appeared in front of Yuma and it opened its mouth, a orange light forming there as a terrifying power up noise is heard

papy: goodbye Yuma

she said as two more dragon heads appeared aiming at her and charing as well

*shink*

a gasp of breath comes out of papy's as the bones and heads disappear. she looks down to see a spear in her guts. she tries to touch it but it disappears before she could and she turns to see kala and a crying Yuma.

kala: I'm so sorry papy. for killing y/n, but orders are orders

papy: heh, you really killed him huh. he did so much to make you happy yet you still kill him

Yuma falls on the ground crying. to sad she killed him.

papy: welp, I'm going to mufits... bro... y/n... do you need anything

papy lying on the ground dead and Yuma was crying her eyes out. ( issei is already dead) kala went to Yuma and said.

kala: we got to get out off here now!!

they girls flyed off. issei's flyer flew out off his pocket and began to glow. rias saw the tree dead bodies. she went to issei's body and got out 8 pawn piece's. when she went to papy and y/n a tear forms in the middle of the park, the inside looking like the blackest void imagined. a melted skeleton in a black robe walks/floats out of the tear. it had cracks in its skull like head and it's hands had holes through them.

yes its the Original one

it raised its hand and pointed to y/n and papy before pointing to himself, knowing his manner of speech is something these people would not be able to understand. rias looked at the thing and y/n and papy before sighing and standing back. the creature smiled ( I think) before walking toward y/n as a bag of his own chess pieces appeared and floated above his right palm. rias was shocked but even more interested as to who or what this creature is. the bag opens on its own before a white king piece floats out, glowing blue before lowering and entering y/n through its shirt, making the body glow . the creature smiled (again i think) before heaing to papy and letting a queen piece come out of the bag and enter her hoodie and making her body glowing orange. the creature smiled to rias before entering the tear again. 

rias was confused but brought the siblings to their bedrooms.

to be continued

ps I had some ideas from a other story