Yandere Reader X Sans

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...

Uh.... I don't know where we are- wait. No. I do.
We're in the lab...?

"* uh. you can leggo of my arm now... " Sans announces, which awakes me from my thought trail and causes me to let go. "* O-oh my gosh. W-where were you?!" Alphys asks upon seeing us. I blink as Sans shrugs, "* eh, forgedaboutit."

I open my mouth to speak, but I just make this odd sound because I forgot what I was going to say. I blink as I shrug it off. Alphys and Sans leave to discuss classified science stuff.

I don't like that timeline I was in... Sans got hurt... by one of his future selves?!??? A flood of memories come in, the day my sibling died. [Sibling Name] tripped near the waterfall at the dump. I did my best to keep [pronoun] from falling and almost fell in myself, but someone held me back.

I sometimes wish I was the one that fell instead. When I feel like that, I motivate myself to keep living by telling myself I am living for [Sibling Name]. It keeps me going until someone or something makes me feel better.

After that, my memory is... very fuzzy. I don't remember anything until the day I turned [younger than half current age here]... Sometimes I'll get Deja Vu when I dream, probably from that time period.

I look at my hands, trying to see if I'm in the reality we call the "waking" world. In truth, the majority of my day is spent in daydreams. I check my hands for the scar I got from accidentally burning myself while removing a casserole dish from the oven.

It's....

Right where it was before.
I'm not asleep.
Or... at least, not in r.e.m. cycle with my eyes closed.

Wait. Why is Underswap me going by my name? Underswap is where the roles switch, right? Wouldn't I be the dead sibling in Underswap? ... What if...
... [pronoun] is-

No. Bad. I shake my head out of the thought bubble. I leave a note on the fridge that says I went for a walk. I exit the lab and head for waterfall, with the intent of relaxing to the sounds and sights.

On my way there, I hear footsteps. That's normal, though. I shrug as I walk. I go the side of the path and stop. My ear twitches as the person walks by.

See? Hehe, scared myself for no reason. I yawn and stretch before I continue my walk. I find a nice cave behind a waterfall. There are two light sources and an old tutu.

Purrfect. Now I can stay dry and listen to the relaxing sounds as I sort my thoughts. I lay supine and imagine a galaxy on the ceiling. As I do so, I hear the relaxing sounds of the water fall...

....
Bah.
This bores me.
I don't like it.
I get up and walk to the water, with the intention of getting soaked.
However, I just barely take my first step when something.... unexpected, happened.

            I trip over the tutu. Hahahaha. I'm so clumsy. Seriously. I'm no ballerina ... sigh. That was bad. I've heard better jokes...

              Thinking of jokes... Sans usually has really good ones... and he could have gotten hurt worse, or even— no. Come on. I can trust that he can protect himself...

              ... if he wants to. "I mean. It's not like I..." I start to say a thought aloud, but the train crashed and my brows knit as I tried to make sense of the ruins.

           I then realize I have yet to get back up.

.
.
.
Meh.

I sit on my knees with my rear on my heels. I argue three opposing points in my mind.
The only point that makes sense to me is—

                I quickly stand up, "I know you're there." ... no response. "I won't hurt ya... if you don't hurt me, that is." ... still, no response. "Ah, just another one of those moments...." I roll my eyes at myself.

                      I turnto look behind me, "No, no, definitely feels like—" krrrcher. "Pbblllthh" I spat out whatever was just sprayed at me. "Seriously?!—" woah. I feel drained. "uh...yyyyeah."

            " wh-waiit, arrrn't youuu... " Why am I slurring?! Also why can't I— "yes and no; no time to explain as you'll go to sleep in 3..." WAIT WHAT?! "2..." I dun wannaaaaaa........ "1."

Author: So.. um. This has been ready to publish for a while, actually.  buuut, I felt like adding to it, so... it sat here for a while until I actually did and—

You: bah! Write it in a different chapter next time! I got bored waiting!

Author: b-but! Plot twist!

You: I don't even remember what the plot was! I have to start reading this all over again!

Author: sorryyyy... ;u;