Author's Note : Alright. I'm not sure I know how well this'll turn out, but I'll give it a go. This fan fiction will revolve around the many mysteries of WD Gaster in a way. I will also show you all an idea of mine, probably not the first, though, about Sans and Papyrus' origin since their past is a bit of a mystery as well. The skelebros' origins won't be mentioned in this chapter, and I don't know when I'll be able to reveal it. Now, as usual, I hope you all enjoy this fan fiction. Creative Lynx 13, out.

The consistent warmth of the sun was refreshing as well as the fresh breeze that swam across the mountain. Frisk had begun to feel claustrophobic from being stuck beneath the wretched Mount Ebott for so long. Frisk peaked a look towards their friends, curious as to how they had been able to live in the Underground for so long. It was something that they just couldn't grasp. And even though the Underground had various regions in which were each different, Frisk couldn't help but find it uncomfortable in every area.

The Ruins were dark, chilly, and created shadows that terrified the young human. Snowdin was freezing cold, a climate that created goosebumps on the human child as well as giving them a horrid cold. Waterfall was a good temperature, but it was eerily quiet other than for the rush of water and whispering echo flowers. Not only that, but Waterfall brought up some nightmarish memories caused by Undyne. Hotland wasn't any better than Snowdin, the only difference being that the place was sweltering hot and had caused Frisk to nearly keel over dead in a couple of time lines. No wonder Undyne hated the place. As for the castle, or. . . whatever Asgore lived in, Frisk wasn't really sure. But the castle was the last place Frisk wanted to be at as it just brought up horrifying memories of battling the homicidal buttercup, Flowey, as well as the battle with. . . the battle with Sans in Judgment Hall.

Frisk shivered at the thought of Sans' calm glare as he tried to reason with the murderous human? Demon? Frisk was unsure. But after trying to solve the issue with Chara, Sans found that he couldn't reason with the insane, soulless being. But. . . something consistently nagged Frisk. Something about Chara didn't add up. She hated humans. She became enraged very easily. She was filled with anxiety about something that she wouldn't tell Frisk, or anyone, about. The weird thing was that Chara could feel. She could feel, but it was mostly anger or hatred. Negative feelings that she never talked about, and instead tried to push away those feelings by killing others. Chara. . . actually used the feeling of sadness and depression to keep away her hatred and rage. After every genocide run, Chara would actually cry for hours upon hours before resetting everything, only adding to her problems. Even though the depression would chase away the other two feelings, those feelings would always come back. And each time they did, they brought a couple new friends; Guilt. Grief.

The gentle voice of Toriel, the previous queen of the Underground and the caretaker of the Ruins, startled Frisk out of their thoughts, "My child. Are you alright? You looked like you were contemplating something that maybe I should know about?"

Frisk turned their attention towards their mother, telling her that they were fine in hopes that doing so would cause Toriel to believe such a transparent lie. But the worry that Toriel contained never fled. It lingered, but turned its attention towards the still sinking sun in hopes of distracting it. Frisk did the same, mentally beating them self up, yelling at them self, for their stupid mistake of showing an expression. They actually wore an emotionless face because they didn't like people seeing their emotions and feelings unless they truly wanted to show how they felt. They had only shown their minor emotions a couple of times in the Underground, but never a major one. They never showed the confusion they felt. They never showed the aches of guilt. They never showed their constant depression. . .

Everything's fine. Everything is completely fine. They all have their happy ending. Everyone. Though, . . . never mind. It's nothing.

So, everyone was now happy. The genocide runs were over. The pacifist runs were over. The neutral runs were over. The resets were over. There was going to be no more of any of that. That was all. . . done. . . with?

Frisk found them self looking up as faint light leaked into the surrounding cave. Frisk sat up, an expression of fright crossing their face. They felt them self hyper ventilate with panic as they realized that everything reset. They knew that Sans was going to kill them. He was going to give them such a bad time that they felt sick to their stomach from just thinking about it. Their blood ran cold with the fear they felt, but soon recomposed them self so that they wore their expressionless face again. They had no idea what was happening, and they weren't sure they wanted to know. But that was before they remembered Chara.

'Chara!' they thought to Chara, making sure they sounded furious with her doings. Or, at least, they thought this reset was her doing. They waited. But nobody came. Nobody answered.

'Chara?'

But, once again, nobody came. Frisk began to panic again as the thought of Chara missing was sickening. Chara had always been there with them. From the very beginning she was there. But now, nobody was. Frisk felt the shadows try to curl around them, trying to choke them to death. Trying to kill them with thoughts of horror and fear. Frisk stood so they could escape the shadows as well as look for Flowey, the only monster, other than Sans, with good memory for even when things were reset. They walked through the familiar corridors and caverns until they came to the little patch of green grass that Flowey should have been waiting in. Should have. He wasn't there. Only a patch of black colored grass. Something had managed to kill the grass, making Frisk's stomach squeeze with anxiety at the thought of Flowey being killed. They tried to shake the feeling away, but couldn't. They knew something wasn't right.

They ran through the other corridors, trying to find Toriel. Chara was gone. Flowey was gone. Something was very wrong here. Something wasn't right at all. With each thought came a darker one. One that screamed of the unknown. As Frisk ran down the many hallways and through the multiple caverns, they could feel their countenance fold into something that resembled fear. Anxiety. Distress.

Frisk was relieved to find Toriel walking down the hallway that she had first tested the young human of their independence. Frisk continued to run towards them, but remembered that she wouldn't remember anything. Frisk distorted their face into an unemotional one. They slowed their run to a walk, trying to seem calm. They weren't going to break a second promise to Sans. They couldn't for they were already going to have a bad time, so why not try to minimize the suffering for the next, oh, . . . hundred or so battles against Sans.

Toriel's sweet voice cut into their thoughts of endless nightmares that was thick with fear as she saw them walking this way, "Oh. Hello, child. How did you get past all those puzzles?"

Frisk answered with a lazy shrug, similar to one that Sans would make. They suddenly felt a pain of. . . not guilt. They weren't sure as to what they felt. Like they were missing something, maybe? It doesn't matter. There was a bigger problem than trying to figure out how they were feeling.

Once again, Toriel's voice chipped at their thoughts, bringing their attention towards her, "It does not matter. Could you stay here while I attend to something?"

Frisk shook their head, feeling culpable for making Toriel's kind smile fall. But they were glad to see that Toriel regained their happy expression, making Frisk smile as well. Toriel told Frisk that if they wanted to go home, instead of wait here for the 'surprise' pie to be cooked, that she would happily guide them through the rest of the Ruins. For the remainder of the Ruins, Frisk followed Toriel in all avidity and nervousness to figure out what was happening. Through out the rest of the trip to Toriel's home, none of the other monsters attacked. No Froggits. No Whimsuns. Nobody came. Most likely because Toriel was around, and they were afraid of her, right? They were terrified of her. But. . . Frisk had caught a glance at a couple of Froggits and saw that they were much more terrified than if it were just Toriel. There was something else. Probably something magical of which Frisk was unable to sense since they weren't a monster. This cause Frisk's fear to rise once again.

Eventually, and with some relief, the two reached Toriel's home and Toriel played through the script of which she showed Frisk their room. Frisk went inside and began to try to piece things together, but, with the little evidence they had, they couldn't come up with any real possibility. They sat on the bed and tried contacting Chara again, only to get zero responses other than that of the silence. They were alone, so they had to figure things out by them self. They thought up many reasons as to why Chara wasn't around; She found another host, she wandered away for a while to clear her mind in her ghostly form, or she's sleeping and, therefor, not answering. Frisk eliminated some of the options relating to Chara ignoring them since they were unable to feel Chara's presence. They also killed the thought of Chara having another host since that host would have to be a human with stronger determination then herself. The thought of Chara wandering off, or doing something similar, was also demolished since Chara would have told Frisk about deciding to leave for a while. That left the horrifying ideas that were created from pure fear on what could have happened to Chara, which ranged from Chara somehow being killed to her being kidnapped by someone.

A sharp knock at the door startled their thoughts as they jumped from the sudden noise. The child got up to allow Toriel in, or. . . thought they were going to let Toriel in. They grabbed the doorknob and turned it so that they could look up at Toriel, but instead. . . they saw a shadowy figure. He was a monster that they had seen before, but only a few times. His hands were disconnected from his. . . body? Not sure, but he was mostly a liquid having melted somehow. He smiled widely as his left hand glowed with a faint, red aura. He began to speak in a language that Frisk was unable to understand. He saw this, his pointed smile falling. So, instead of talking, he decided to show. He moved the faintly glowing hand to reveal Chara, pain filled in her eyes as she had a hopeless expression on her face. She had a soul, which was strange enough, and that soul showed flickers of red ensnared in a thick black goo. Not only that, but she only had half a soul. That's when Frisk's own soul found itself outside of its host, and, it too, was only half a soul. Frisk's soul had somehow split in half, and Chara held the other half.

It's amazing how a single GLITCH can cause such a large change in the game. There's a new player. And they aren't human.

. . .

Sans awoke groggily, rubbing his left hand onto his skull. His skull throbbed as he sat up. He was thinking that he must have fallen asleep watching the stars or something, but he couldn't quite remember anything past the sunset that he and his friends had seen upon exiting the nightmarish mountain. That's when he realized that something was very wrong. He was in a house, laying on a mattress. His friends couldn't have had enough time to set all this up. Even with powerful magic, they couldn't have gotten an entire house set up in such a short time.

Sans began to feel his panic rise as his left eye felt the burning sensation of anger come about. He tried to calm himself, and, after he was able to manage his emotions, he turned on a lazy smile so he could fool anyone that he was perfectly fine instead of slowly going insane. He sat in wait for the usual; Papyrus yells for Sans to wake up, the two go out on patrol for humans, then the rest of the game plays out being either genocide, pacifist, or nuetral.

Sans never heard Papyrus' call, feeling nervous about the silence that was now strewn across this timeline. Papyrus would usual yell at Sans for a good ten minutes to hurry up, but ten minutes had passed with nothing but unsettling quiet. Sans stood, taking his blue jacket out from the closet and pulling it on. He walked out of the room as he pulled the white fur lined hood to try to calm his nerves down as fear prickled his bones. He walked to the balcony and called Papyrus' name questioningly. But nobody responded.

Sans walked to his brothers room, knocking on the door before entering. He peaked inside, calling Papyrus' name again. He looked around the room, and even in the closet, but found nobody. He appeared to be alone, but Sans still searched the house. He searched throughout the house once. Then twice. Then thrice. Then another seven times. After that, he went outside to search for his seemingly missing brother. He walked around the Snowdin town with panic lingering around him. Everyone saw his frown, worried about him as they had never seen him in such distress. He didn't care. They shouldn't worry about him. They should be worrying about Papyrus. All he cared about was Papyrus. His brother. The only problem was that nobody knew who Papyrus was. They couldn't remember him, and so they thought Sans was going insane.

Maybe he was. Maybe he was insane. Maybe he imagined having a brother when he was actually all alone. Maybe he had imagined everything. The resets. The genocides. The pacifists. The neutrals. Everything. Maybe he had dreamed it all up. Maybe he had fallen down but managed to survive it. Maybe he. . .

Sans saw the first sign that Papyrus was real and not just a figment of his imagination; An orange skeleton key. Sans felt like he should remember what the skeleton key meant, as if it had a deeper meaning to it, but couldn't remember. He felt like there was supposed to be something he should remember. No. Someone. He understood what the skeleton key meant, but there was someone he was forgetting. But he just couldn't remember who.

Sans picked up the key, moving it into different angles so he could get a better look. He hadn't seen this key in years, and he couldn't remember when he last saw it. Sans had known Papyrus had had the key, but only in the back of his mind. He had never thought about it, and he knew Papyrus kept the key hidden. Papyrus had kept it wrapped within the his bright red scarf all while it hung around his neck as a sort of necklace. And now? Now Sans had found the skeleton key laying on the ground, slowly being covered with a snowfall that fell gently without any thought that they were upsetting the lone by reminding him of how alone he was.

Even though skeleton keys had a simple design, they sometimes had an intricate design at the end of which the key is held. This key, in particular, had a handle shaped as a heart. A monster's soul. The heart shaped soul had green tinted glass lined with the orange bone that the skeleton key was made of.

Sans knew skeleton keys were something rare since skeletons were rare. Skeleton monsters had created these keys so as to protect one another and to show each other love to relatives, close friends, or someone they loved romantically. But it was also a dangerous weapon that was used in case of an emergency. Though skeleton keys were made of bone, they could emit the power of human souls when made correctly. As a result, this weapon couldn't be used very often, hence used in emergencies. Skeleton keys were usually worn as necklaces, held by a chain either made of violet amethyst, deep blue lapis lazuli, light blue sapphire, green emerald, yellow topaz, orange tourmaline, or red ruby. The glass surrounded by the bone on the handle wasn't actually glass, but instead was made of one of the gemstones. Though, the handle wasn't always shaped as a monster soul. The shape was usually formed in a way that represented the monster's personality. This one, the one that Sans had made for Papyrus, contained the green emerald. The chain was spread across the snow, showing that it had somehow been broken. Papyrus may have tried to use it to fight back, but whatever he was fighting was very, VERY powerful.

"Sans!"

Sans jumped at the loud noise that resonated throughout the silent forest. Sans looked over his left shoulder as he put away the skeleton key into the right pocket of his blue jacket. He brought out his own key that had been laying gently in his left pocket, holding it tightly in his left hand. His key was a dark blue instead of a bright orange, and his had a star as the handle design instead of a monster soul. Surrounded by the dark blue bone was yellow topaz, the chain matching in color and gemstone.

"frisk?"

Frisk looked worried. No. Terrified. They looked horror stricken, of which Sans had never seen before. He had either seen no emotion or, when there was emotions, there was only happiness. Frisk was deeply troubled. Confused, even.

"Sans. Sans, Chara's missing."

Sans felt an angry expression grow on his face as his left eye was swarmed with his magic. He asked the human child as to why he would care about Chara being missing. But Frisk didn't answer his question. Instead, they went on a rant of how Flowey was also mysteriously gone and how they were scared to near death about how everything had reset without them actually doing it. But Sans wasn't phased. He had heard a similar excuse, the only difference being 'Chara took over'. Though. . . Frisk looked genuinely horrified and filled with confusion about what was happening. Right as Sans was about to speak was when Frisk noticed the key hidden snugly within

They asked what Sans was holding, but he just held onto the key even tighter as he shifted himself so he could face Frisk better. Frisk walked towards Sans who took a step back. Sans felt his eye sockets widen with fear as the two of them brought horrid memories of fighting Frisk within Judgment Hall. Frisk apologized, and cringed as if expectant of Sans to attack them. He did recall himself making a promise that if they had broken their promises that he would give them a bad time. But this was different. Frisk, for once, was showing genuine feelings that they felt. They. . . reminded Sans of himself. He hid behind a tense smile and horrible puns, they hid behind an emotionless face and false laughter. In a way, the two were one in the same.

"have ya told anyone 'bout the resets?"

Frisk looked up, shock spread across their face. They shook their head, telling Sans that they hadn't told a soul about the resets. As the shock faded, Frisk began to look confused. Even worried. Sans closed his eye sockets, the scorching blue light from his left eye having dimmed. He took in a deep, shaky breath. He needed to calm himself down.

Something wasn't right.

Author's Note : And that is the first chapter complete. I hope this was enjoyed and I'll try to get out the next chapter asap. Creative Lynx 13, out.