The Monster Inside Of Me (UF-Sans x Monster-Reader)

Who knows what from who?

Diana's POV

"Sans, are you blushing?"

There was a red light spread across Sans' face, which I supposed it's blushing. He than looked down, hiding his face in his red hoodie.

"I think it's cute!"

"What?"

"The fact that skeletons can blush! I think it's cute!"

I think that's when I blushed too.

"So, kid, wanna hang out at Grillbz?"

"Sure thing, Edgie X3 !!!"

"Why you keep calling me like that? I thought I told you not to!"

" Aww, come on, it suits you! It's a cool nickname!"

"Heh, you won't get under my skin today, kid!"

"Why not? I thought you jumped out of your skin long time ago!"

"Still having it, kid!"

"*giggles* I know! Let's go!"

On our way there, we got past Frisk in his cage, staying on the other side of the road. (a/n: Frisk is a girl here, and I believe frisk is a girl in game too!) She kept staring at you and Sans with a sad face. She still has the signs that Toriel wrote using the knife.

"Um,... Sans,... How many days are left 'till Frisk's execution?"

"Three days, I believe...."

"Three day-.... That's on my birth day!"

" yeah so? Ever heard of coincidences?"

"I don't think this is a coincidence, Sans!"

"Why not?"

"I believe it's planned to be like that. Maybe someone wants me to kill her. I don't think I got the bones to kill someone!!!"

I started to talk louder and louder.

"... O..k let's PRETEND you're right. Who would plan that? I mean, I haven't seen Asgore around!"

" Not Asgore! Someone told him to do it on that day. Someone who knows what's going to happen then!"

Sans' face looked hurt.

"*sigh* kid, I...... "

"Sans, who else knows?"

"..."

"???"

"Welp, the only persons that know are Grillby, Paps, Undyne, Alphys, Mettaton and I think these are all of 'em!"

WHAT! WHERE THE FUCK DO THEY KNOW FROM!!!!!!

"I won't bother asking you who they know from, but ... I gotta go talk to Asgore!"

"Whoa, chill kiddo! You know Asgore won't hesitate to kill you. He won't let other monsters play with you, like he did to Frisk. And even if he did, who knows what other monsters will do to you! It can be worse than what Toriel did to Frisk!"

"That won't happen... And I won't kill anyone either... *sigh* Sans,... I don't wanna turn into a monster. I don't even think that Toriel knows how afraid I am!"

"Welp, duuuh Toriel doesn't know that you found out!"

"I'm going to tell her. Could you forget about going to Grillbz for now? You can go alone, if you want!"

Then I headed into the ruins.

"I'm coming with ya, kiddo!"

My lips then formed a smile, seeing that someone who once was cold hearted cares so much about me.

Time skip brought you two in front of Toriel's house

Sans' POV

Diana entered the house, and I was following her from behind.

"M-mom!"

"Oh, my child, I see you're back,... And you brought Sans with you!"

Toriel than threw me a "'I'm gonna kill you'" look.

"Mom, I need to tell you something,... A-about my birthday!"

Toriel than dropped a cup made of glass, and it shattered.

"Sans, why did you told her!?"

"Tori, don't get me wrong there, I didn't tell her anything!"

Than she grabbed Diana from her right wrist, and in her other hand she grabbed a knife, pointing with it my neck, from inches away.

"MOM-"

"shush, my child!"

"What the fuck, Tori!?"