UNDERTALE ONE SHOTS!

Heart is within

            You've been living in the underground for as long as you can remember.
You made lots of friends like the skeleton bros or Udnyne, Toriel
, Frisk and Alphys!
But every time  you met them they would attack you once and leaving a scar on your neck.
Now it's one big scar. You don't mind though. But now you had a dream. Where Frisk would go and kill while everyone is dead but sans is fighting them forever until.

You see him die.
After you see this you shot straight up in your bed crying.
Ever since then you never moved from your spot on the bed or ate. Or drinked anything and most likely you haven't talked to anybody. It's been a month and everyone is worried sick about you but every time they knock on your door you just stay quiet to make them assume your asleep and they would believe that.
But not this time.
There was a knock on your door but you didn't answer like always.
"*(y/n)? Ya in here?*"
It was Sans. You heard a door open and you heard footsteps coming down the hall.
You stiffened as your door swung opened.
And stood there Sans, he saw your body's conditions and he quickly ran over to you frantically
"* Oh my god kid what's happened to you? Where have you been?*"
The questions kept on coming and you just cried in your knees.
"I I d-don't w-wanna t-talk a-about i-it h-heh I a-am f-fine."
You said while trying to make Sans leave. Just looking at him makes you wanna cry and run away but in this sitiuation you couldn't
Sans narrowed his eye sockets on you.
"*(y/n) look at your self when was the last time ya ate!?*"
"A month and a half......" You replied
Sans eye sockets widened
"Last time you drinked?" He asked with a more scared tone
"Month and a half....." You answered
He started to get even more scared.
"*What have you've been doing this whole time then!*"
Sans frantically looked at you scared.
"Heh, w-well w-what d-do y-you you t-think?" You cried out.
You just sobbed.
Then Sans didn't expect this but you plunged into a hug.
"(Y-y/n)?"
Sans asked while hugging back
"P-ple-ease d-don't e-ever l-leave t-this w-world........"
(Y/n) choked out
Sans just looked at you.
"*Kid w-what d-do y-you mean?*"
Sans at this point was terrified at what will come out of (y/n) mouth.
"Timelines the timelines I saw them in my dreams, Frisk evil, everyone dead a-and you..... F-fighting AND SEEING YOU DIE IS HORRIBLE AHHHHHHHHHHH" you just balled and hugged Sans harder.
"* k-kid it's o-ok everything is going to be ok.*"
Sans said while hugging you and not letting go.
He couldn't believe that you saw this
After that you gotten a lot better and happy!
But one day Frisk came in and acted strange.
They kept hitting you until she cackled.
"F-frisk?" You yelped in pain
They're  eye started to glow red.
Then they stabbed your neck.
"F-f-frisk?!" That's the only word you could say before they laughed and left.
You were slowly dying and you needed to warn everyone.
Sans started getting scared again as you weren't yourself so he got everyone and they all went to check on you
"*(y/n) you doing ok we're Wor-*" Sans was stopped by seeing you dead with a knife in your neck.
But there was a message from (y/n) in blood on the wall.
When everyone came in they cried but Sans read the message.
''Guys if you are reading this then I'm dead.............
The one who killed me heh...... Good question
Frisk.   I'm warning you guys watch out for each other they will most likely kill you all! And Sans tell everyone to put there hand on my head. You'll understand.'

And with that they all put there hands on your head. And with That there came out a hologram of you before dying.
'Frisk don't do this its a mistake! I don't wanna fight!' You pleaded
But with that Frisk attacked you but you dodged
'Fine if I have to then I will!' Your eyes glowed black as black mist came from your hands and you attacked witch grazed there arm to leading on to bleeding. They then rushed at you and plunged the knife in your throat.
'Heh right in the weak spot.....'
With that you slowly died
Sans and everyone continued reading the message
'So yeah but before I died I gave my soul out if you put your hand on my heart you'll get my soul, and g-guys p-please and p-please s-stay determined'
Everyone was upset and felt betrayed by Frisk but they all put their hands on your chest came out a black heart and it broke into pieces and each piece went to each person.
After that they all kept one another safe.
Sans especially went to the judgment hall waiting for Frisk.
And now (y/n) was within them all for even more strength.
But this time, they were all
DETERMINED