A Sans X Reader one shot

<3

Weeks before:
" undyne!! I'm here for my cooking lesson!!" Papyrus announced as he strutted into her home. Undyne whipped her head around to face him. " your late!!! Why is that!!" She yelled, getting cooking supplies out. Papyrus stopped in his tracks and looked around suspiciously. " can I tell you a secret?" He whispered, she hesitantly nodded. " I know a human. She's so awesome too! Sorry we were hanging out with sans and lost track of time." He stated.
" w-wait!! You know a human?!?! Where?! I need to take her to dree-" papyrus cut her off. " no!! No! You can't tell him, please!! She's like a sister to us.. Well more of a sister to me, sans kind of has a crush on her. But please, just.... Spare this human. We couldn't live without her..."

Present day 1st person:
I walked around the underground, almost every conversation I hear is basically the same.

' I wonder what the outside world is like'

' do they have enough souls yet?'
' I hate the underworld, it's too dark here'
I didnt mind the underworld, it wasn't as bad as they say it is. I have been top side, the ' monsters' down here are so much kinder than humans up there. I fell down here a couple years ago. I was being chased by a bunch of bullies and took a wrong step, now I'm here.

It won't be for much longer though. I have a weak heart plus I haven't been able to see a doctor since the fall so I'm kind of running out of time.

' yeah I heard that they don't even have a single soul taken yet. Ugh we are never going to see the real mountains like we always dreamed...' I heard a lesser dog whimper as I passed, it breaks my heart ( no pun intended) to hear their cries. Even my two best friends, sans and papyrus, have longed to see the real sky.

3rd person POV:
Undyne stormed around the underground, searching for humans to sacrifice. She's been searching for hours and started to get real agitated. " ugh! It's useless!! Why on earth would a stupid human be stupid. Enough to fall-" she quieted her yelling when she heard a soft voice singing by the bright blue flower beds.

Wise men say only fools rush in
But I can't help falling in love with you
Shall I stay
Would it be a sin
If I can't help falling in love with you

Like a river flows surely to the sea
Darling so it goes
Some things are meant to be
So take my hand, and take my whole life too
'Cause I can't help falling in love with you

Like a river flows so surely to the sea
Oh my darling so it goes
Some things are meant to be
So won't you please just take my hand, and take my whole life too
'Cause I can't help falling in love, in love with you
'Cause I can't help falling in love, falling in love,

I keep falling in love with you....
Undyne ran through the woods until she reached the clearing of flowers where the girl sat. " HUMAN!!!" She screeched, making the girl jump to face her. " sacrifice your soul to us now!!" She ordered, getting in a stance. The girl simply stood up and nodded her head. " ok" she chirped cheerfully, undyne took a step back in surprise.

" wh-Wha?" She stuttered. The girl giggled and took a step closer to Undyne. " uh... Are ya sure? I-i mean like... Well I didn't think it would be that easy to persuade you." Undyne muttered, the girl giggled a little more and looked down at the flowers. " actually, I have been wanting to do this for a while now. I have been searching for you as well so you can take me there" she admitted, watching a little bug hop from flower to flower.

Undyne squinted her eyes in disbelief. " what are you trying to pull? Why would someone just want to 'give' up their soul? Your life can't be that difficult" she queried. The girl sighed and looked up at the dark 'sky'. " I don't want to die, I just want to help people. It's not like I have that many years left anyways with my heart being as it is..." She mumbled the last part but undyne still heard.