Pulling My Heartstrings (Undertale Au Smut)

Horror!Sans x Reader

"Horror!" I called out, walking through the castle—I stopped in front of his bedroom door and peeked inside, "Horro-"

I froze in an instant as I saw him sitting on his bed and crying silently. I blinked in confusion, looking around for anyone else in the room. The only ones in there were the two of us, though.

Horror... crying?

I took a hesitant step forward, and he quickly looked up at me with wide sockets, looking absolutely terrified. He made a noise and turned away, trying to wipe his tears away as fast as he could. I walked forward slowly, unsure if I should approach him or not. I had never seen him cry before, so I had no idea what had brought this on, but...

I reached out a hand, and he flinched away when I touched him.

He was shaking badly, and I could see how badly his bones rattled under my hand. His eyelight was fuzzy, but he wouldn't look at me.

"Horror.. it's just me.. Y/n.." I said softly, sitting next to him. He glanced up at me with one eye and turned away again, curling into himself.

I bit my lip, unsure what to do.

After a moment, I gently pulled him against my chest, petting his skull soothingly. I felt him tense in my arms, but then he let out a small sob and hugged me, clinging onto me for dear life. I rubbed his back, making soft noises in an attempt to calm him down.

Horror buried his face into my chest, and I felt him tremble against me.

He looked up at me again, his eye glowing softly, and I wiped his tears away with my thumb. He looked up at me again, his pupil dimmer than usual.

He suddenly leaned in, pressing his teeth against my cheek. I sighed, continuing to rub his back soothingly, "What happened..?"

He hesitated, glancing up at me again. His voice was quiet, and it shook a little when he spoke,

"i-i'm sorry..."

"It's alright.. You didn't do anything wrong.."

He nodded, burying his face into my neck. His breath hitched as he tried to calm himself, and I continued to pet his skull and whisper soothing words to him.

Finally, after a few minutes, his breathing evened out and his body relaxed against mine. He sighed deeply, and I could feel his breath on my neck.

"are you okay, horror?"

"..y-yeah.. just tired.. i.. haven't slept in awhile.. tried to and it didn't go well... "

"How long is 'awhile'?"

He hesitated, not looking at me, "...a week.. maybe longer..."

"Oh Horror... You should have said something."

He shrugged, still avoiding my gaze, "didn't want to bother anyone.. i was fine.."

I cupped his chin, forcing him to look at me, "Horror. We would have helped you, okay? You shouldn't have been dealing with this on your own."

He blinked, and tears filled his eyesockets, "i-i'm sorry.. i didn't want you guys to worry about me..."

"Horror, you're one of my best friends. I'll always be here to help you, and so will the others."

He smiled, his pupils brightening slightly, "thank you.. i'll try not to keep things from you again.. promise.."

"That's all I ask."

He sighed, nuzzling against me, and I held him close, rubbing his back, "you know i love you, right?"

He nodded, "i love you too."