HHeeeyyyy guys! So this fanfiction is a collaboration between Salkeya, EveeFan, Nichelle M, ttflea and I! So in order to enjoy the full experience go read Salkeya's Sanctuary for All & Q&A and the rest of my amazing author friends fanfictions! Now without further ado… Enjoy, The Mysterious House. P.S. The Sans in this story is actually Sinner! Sansy (from I'm a Sinner).

(Sans' POV)

"Ooww…" I moaned as I stood up in front of a strange house I had never seen before. I looked around trying to see if I was anywhere familiar but to no avail. While I was looking around I heard a strange crinkling sound in my pocket, I reached in and pulled out a small folded piece of paper. "What the...?" I quietly asked myself as I un-folded the paper. Once I completely unfolded the paper it turned out to actually be a letter, so I decided to read it thinking it would give a least a somewhat decent answer.

Dear, Sinner! Sans

You have been formally invited to the House of Sanctuary for OC's and AU characters in need. We ask that, in return for your safety you will answer people's truths and perform dares. This will serve as a kind of 'rent' while you stay at the Sanctuary. We also have received information on the nature of the current situation you are in from a self-acclaimed 'special friend' of yours. Do not worry on receiving dares where you are supposed to injure or kill another person in any way, shape, or form. These specific regulations are listed as such in the below section:

You will not be asked to perform any killing or fighting dares.

You will not be forced into a relationship between you and another character.

People can give you anything. (EXCEPT weapons or anything else dangerous)

Lastly, you will NEVER be forced to accept a dare you don't want to do.

If any one of these regulations is broken without the House Master's realization, you may speak with her on the issue should such an event occur. Overall, we will be expecting you with open arms and the best hospitality we can give you. We hope to see you soon Sinner! Sans and wish you the best of luck in your journeys.

Sincerely,

The House of Sanctuary Staff

"Well… at least I know where I am now." I said to no one in particular. I looked up from the letter to look at the house again. It was a nice house; it was similar in build to my house except it was red 'Must be made of cherry wood' I thought to myself. I looked back down to the letter and read it over again. "A sanctuary huh?" I asked myself as I looked back up at the house. I chuckled a little "Heh, maybe I'll stay here for a little whi-" I attempted to say to myself before I was cut off by a sudden pain in my skull. It felt as if my skull had been beat in with a hammer and my vision became clouded and foggy. The pain continued to burn into me like a hot poker for what felt like eternity, when I was suddenly greeted with a series of images. I recognized some of them as they passed through my mind like a projector slide show. One after another in order, Frisk and I with my telescope in Waterfall, Alphys' lab in Hotland, my lab in the basement of the house, The True Lab where my father and I foolishly experimented with DETERMINATION, a large bottle of pills, a group of people I didn't recognize, a small room, and finally the image that made cringe the most, the same group of people lying face down before a shadowy figure.

After the last image faded away the pain eventually disappeared with it. I willed myself to look at the house again and began looking it over one more time to see the real details of the house. I was looking around at the surrounding areas of the house but it was just woods all around from what I could see. While I was looking around, I suddenly heard a quiet whistling sound coming from a gravel path that I didn't notice before. After about a minute whistling the person who was whistling walk out of the shrubs, and I was shocked. The person, or rather monster who was whistling was none other than the infamous scientist I called my father, W.D. GASTER. I couldn't believe my eye sockets, here walking right in front of me was the man I thought time lost forever. I couldn't stop myself from starting to run after him wanting a hug, it had been so long sense I felt my father's loving embrace I just wanted to feel it one more time even if he wasn't my dad.

"Dad!" I called as I broke into a run towards him. "Huh?" he asked as he turned around to look at me and took a few steps back in shock. He must have heard about my case because he started running away. "Dad wait!" I called as I gave in to the chase. We did a lap around the house and he was screaming like he was on fire. When we ran back around the front, I actually took notice of the road in front of the house "Oh." I thought. Dad ran through the front doors of the house and I followed him as he screamed "HELP!" while running through the house. "DAD! I JUST WANNA GIVE YOU A HUG!" I called after him. "GET AWAY!" he yelped back fearfully. I stopped running and felt my red eyelights quickly arrive in my sockets and I grimly thought, "He's right. Why should he accept me after what I did?" I shook that off thinking "This a different version of dad, there's no way he knows about what I did back then." For some reason that made me happy, I felt my eyelights go back to normal and started running after dad again. "Please! I just want a hug!" I called after him. "NOPE!" He yelped and teleported away with that.

I let out what would be like a childish whine. "Awww… Of course! Even dad from another universe won't be kind to me…" Suddenly a girl with short blond hair, blue eyes and tan skin said "I don't see why he wouldn't! Here, I'll hug you!" cheerfully and began to walk closer to me with open arms. She was about half way to me when another version of me called out "No! He'll hurt you!" and she stopped right on the spot. "What?" she asked. I looked down at my slippers and looked back up again. "Y-yeah… I will" I admitted. She tilted her head at a slight angle, "How so?" She asked me. "U-uh… I was born with a condition that, when I make contact with DETERMINATION, I, uh, go blood thirsty, and, uh,… It had stopped, but no-" I tried to explain but my mind became dark and foggy again. "BuT nOw, It'S cOmE bAcK…" I growled evilly. Suddenly a girl who was all black in coloring jumped out and screamed "I WON'T BE HAVING THIS SHIT GO ON!" and she grabbed a bottle of pills plus a glass of water. "WhAt's ThAt?" I asked her. "Medicine that will help you!" She yelled. She then ran over to me, put a pill in the water, and forced me to swallow it. "WhAt Did ThAt Do?" I asked. "NoThI-" I attempted to say but I cut myself off when my mind became clear again. "W-what? It stopped!" I cheered. "Only for a day. Take one every day, and it won't happen again!" the girl in all black explained happily. "T-THANK YOU!" I shouted gleefully. "Now, let's get you settled in!" The girl with blond hair chimed. "Thank you. So much." I almost cried as I followed the two girls and the other version of me down a hallway.

"Here we are!" The girl in all black chimed as we reached the door to my room. The girl in black then opened the door to my room "Voila!" she happily stated as she let me look inside. "Oh. My. God." Was I could manage out. It looked exactly like my room back home in Snowdin. The only difference was there was no treadmill in the middle of it. I ran inside and jumped onto my mattress and let out a comfortable sigh "I feel like I never left!" I chimed. "Good, looks like were all done here. Oh, by the way I'm Salya and this is Creativity! Sans." The blond girl introduced herself and gestured to the other version of me. "Nice to officially meet you." I replied. "Alright, we'll be out in the living room then." Salya chimed as she and Creativity! Sans walked down the hallway. "Okay, well I hope you like it here Sinner! Sans and feel free to express yourself to the other characters when you can!" The girl in all black happily cheered and began to walk down the hallway before stopping herself and backing up. "Also, I'm Salkeya and I'm the House Master." She chimed as she introduced herself. "Alright-y Salkeya nice to meet you too." I casually said "Okey dokie! I'll be right down the hall if you need anything!" She said as she closed my door. I sighed one more time before slowly drifting off to sleep. But not before silently saying to myself "I think I'll enjoy staying here for a while."

Aaaaaaaannnnnnddddd Done! Chapter 1 of 'The Mysterious House' is done I really hope enjoyed my part of this collaboration story with the other authors I mentioned earlier! Want more Sinner! Sans action? Well then go read Salkeya's Sanctuary for All & Q&A if you haven't already. She is a really cool author and the creator of Salya and Creativity! Sans. What are you waiting for? Go read it already! P.S. have an awesome Day/Afternoon/Night!