Sup guys it's been a while by the way I'm gonna make a new story just wanna know which one you guys want (Frisk or Sans x Reader) Choose this story will have one or two more chapters and that's it so seya later. Enjoy.

After a while with Chara being together with you and everybody else being ok with it or so you thought you decided to go on a hike with Frisk, Chara and Papyrus. It was a nice day so why miss it. Of course Sans tagged along (Chara) because he wanted to check something (Chara) and he also was concerned for you health. (CHAR-WE KNOW OK CHILL!!!!) Anyway there was actually no reason about Chara to be honest because if all of us hang out he simply wants to join in with or without Chara. "How much more till the hut?" Frisk asked. "About 5 more minutes" you answered. "And it's not a hut it's a house I told you my parents were rich" you said. "Well the Richer the Richier" Sans said. Frisk started laughing a bit. You smirked.
Later you arrived to the house.
Welcome we'll stay here for the night. "Sweet" everyone said. It got dark so you went to your room. "Hey y/n can I stay this night with you and Chara?" Frisk asked. "Sure why not oh and Chara I think one night won't harm anyone now will it?" you said. "Nope it's fine besides its not such a bad idea to be honest" Chara responded. "Welp get some sleep kiddos" Sans said before heading toward papyrus. "Gnight" all three of you said.

1 am...
You slowly wake up and try to go downstairs of course Chara wasn't fooled but they left you that once since they didn't think you'd run away and of course you didn't want to but you head outside of the house into the woods. You went so deep until you arrived at the water falls. You stood straight thought for a second then you stood in a battle position and raised your arm. Suddenly swords dashed from the ground and you could even decide which direction. Now the tricky one. This attack was new and you have never actually seen it. It's a dark Gaster blaster and it's not like sans. Not at all in fact it's worse then Sans's Blaster. It shoot black lasers instead of blue.

You tried to summon it but nothing happened. You demanded it to show it self and suddenly
"Gaster blaster sounds" you fired. You looked at it and it looked at you for some reason. Then it said "You should not do this again ok". You nodded but wanted to know why. "Your soul is damaged and with that problem you can't use powers like these also you're half angel and half demon but for some reason you are different from the others" it responded. "How can you even talk to me?" you asked. "I'm not I'm in your mind" it responded and with that it disappeared. You went back but then something happened with your soul like as if it was slowly getting worse then before and you passed out with that.

Meanwhile...
Chara got up instantly and went to wake up sans. "What do you want brat" he asked. "It's y/n they're hurt or damaged I don't know just somethings wrong ok let's hurry up" Chara responded worried. "Ok let's take a shortcut" Sans said teleporting Chara and him towards you. You were passed out but your soul it kept changing colors and the worst is that it's cracked. Not broken just cracked. You hurried back home while you did and everyone was shocked to see what happened to your soul. But then it happened. 10 different souls emerged. Each one was different colored and one was red next to a white and a black soul. But the black one was upside down so that's when they realized it was eighter a monster or a demon. Chara tried to wake you up but you simply showed no sign of life and then the souls vanished in you. But you didn't wake up. And the worst part every single body part was infected by mad soul disease. In case you don't know what mad soul disease is let me W. D. Gaster explain. So the disease is meant for monsters but it's also possible for humans to get infected if multiple souls are attached to the body and here's the following of the infection (fever, choke struggle, halusination and death!) I hope you know what that means for y/n but there's a cure ably I lost the documents and now don't know which one it is. Anyway enjoy further on goodbye for now.
"SANS WHAT ARE WE GONNA DO?" Papyrus was worried sick. And he's always like this. "Don't worry bro we'll find away to fix this. Well...find...a...way" Sans replied but was almost in tears since he actually had no idea what to do. Chara was crying and Frisk couldn't do anything. But they all asked themselves how did this even happen. (By the way there's a hint that might make sense if you find it and you're sure that it's the reason comment and tell me what you think it was)
Suddenly your soul cracked even more and within seconds the soul broke in half. But it refused. With that it came back but cracked again and again and again this cycle kept going and Sans also knew you were suffering. This cycle was horrible to watch for him. After realizing what was going on he immediately activated his powers and held the cycle under control for as long as he could.

And then...
The soul soul broke into a lot of pieces but was held by something white. This force was holding the cycle at bay. Sans sighed in relief and so did the others. Frisk tried to wake you up but failed. "Welp I guess he's in a coma or something" Sans said with a sigh in the end. After that they tried to examine the souls state. "As far as I know there's only one person who knows what's wrong" Sans said and stood up to go get that person. "Wait who-" Frisk wanted to ask who it was but sans already teleported.

Sup everybody I'm going to just say that I'm gonna finish this story and then prepare for the next one also (Chara is still a Yandere) don't get fooled. Anyway tell me which one you guys want and I'll make it. If you guys didn't write anything until I'm done with this one I'll just decide myself since I have no choice then.

Ps: Hope you enjoyed this one.