A/N: Hi guys! Delta here, with another Undertale fanfiction. Remember, Undertale belongs to Toby Fox, and I don't own the idea of Underfell, either.

This one updates weekly, like my other one. I was inspired by the idea that Megalovania was Chara's theme song, not Sans'. And I've always been a strong supporter of Chara being good, despite never having watched Judgement Boy's video. So this is what came out of it. But enough intro. Time for the first chapter.

Chapter 1: Chara

The fall was much, much more painful than I had expected it to be. Then again, being 10 year olds, we "didn't know a damn thing about the world." Or at least that's what our parents said. But the fall knocked the wind out of me, and probably did for my twin sibling too. We had fallen down—or, more specifically, jumped down—together. And even if we hadn't jumped, we both knew that we would have stayed together if one of us had fallen down. It was like an untold rule between us.

Frisk and I were very close, even for twin siblings. We had to be, considering the environment we grew up in. But I didn't want to talk about that. I had enough bad memories from that place. And if you really want to know more... well, maybe Frisk will tell you. I don't think I can muster up the courage. Frisk was always better at that kind of stuff anyway.

But we weren't quite the same person. I had often made jokes about how I was the more evil of the two. My theme song was evil, too. And Frisk was quite literally the paragon of light. Their theme song was so happy, too. And they managed to be optimistic, no matter what happened. I had no idea how they were able to do that. They seemed so hopeful, even after our miserable lives.

Meanwhile, I was the paragon of darkness. My theme song literally sounded like bugs crawling all over me. Or at least that's what I thought. Frisk thought it sounded pretty epic, but I couldn't tell if they were just trying to be nice or if they really thought it was cool. I guessed they were just trying to be nice to me. I was a bit envious of Frisk's theme song, too. It was so happy. And it was exactly three minutes, on the dot. It helped give us a sense of time when we were waiting for things.

Frisk and I really were different people, but we loved each other so much. I don't really have words to describe what I felt for Frisk. We just had a bond. And we could sometimes predict each other, too. They knew what I would probably do in a situation, and I knew what they would do. We were that close.

The fall still hurt a lot, though. I was surprised we had survived. It looked like hundreds if not thousands of feet. There was no possible way to climb back up. I tried to take my focus off the pain by guessing how many bones in my body were broken. For some reason, that didn't seem to help. Surely the fall should have killed us. I mean, we weren't planning to survive. I realized that of all the people who had gone missing in the past probably survived too. After all, there weren't any bodies here. Wait...

Suddenly, I was struck by a sudden thought. What if Frisk had died? That was impossible, right. I would feel something. We had a bond. There was no way that Frisk would be able to die without me noticing something. I tried rolling over to look at them, but their body seemed as frozen as mine did. Clearly, they were in intense pain too. That, or they were dead. But if every other human that fell had survived, surely Frisk had, too? I had no way of telling, since I couldn't get up and move.

I was about to try rolling over to them, despite the pain, when a wonderful song filled the air.

The song was music to my ears. Literally. It sounded the best it ever had been. It was Frisks theme song, of course, and like always, it was so happy despite the circumstances. It filled me with hope. And now I knew Frisk was alive. There was no way they could play their theme song if they were dead. It was our way of comforting each other. Well theirs was to comfort me, mine wasn't really happy enough to comfort anyone. It just sounded good. Or at least that's what Frisk said.

The song abruptly cut off, and I realized what Frisk wanted me to do. I started playing my own theme song. And it was pretty good, I had to admit. Not nearly as good as Frisk said it was, and not even comparable to Frisk's theme song, but it was pretty good. Frisk was delusional to think that my theme song was actually better than theirs. Theirs filled me with good emotions. Mine filled them with the feeling of sin. Or at least that's what I guessed.

I can't really explain how I played my theme song. It was kind of like me pulling on a little string in my mind. It just came naturally to me—and to Frisk. We were apparently the only ones that had theme songs. It was pretty cool, knowing that we had something special. Something nobody else could have. I wanted to hear Frisk's theme song again, I realized. It always filled me with hope. And we both needed hope in a situation like this.

So I cut off my theme song, and after a couple seconds, Frisk's started playing again. I lay down for a minute, just listening to the music. It was good to know that even if I couldn't die, Frisk was right here with me. We'd be together forever. That's what we'd promised each other, back when we were six and learned to not trust anyone but each other.

Then I tried getting up. A sudden stab of pain jolted through me, but I persevered. I slowly crawled to my feet, wincing all the way. It didn't seem like anything was broken, but my left wrist was definitely sprained. That was okay. Frisk and I had had worse pain in the past. The rest of me seemed bruised, but aside from that fine. I just needed some rest. I hobbled over to where Frisk was, and helped pull them to their feet.

"I think I'm okay," said Frisk. "Are you?"

"Yeah," I responded. "How did we survive?"

"I don't know."

"Are you sure you're fine?" I asked.

"I'm fine enough to play my theme song, and so are you," countered Frisk. "Come on. I wonder where that door leads to."

I laughed. That was Frisk, always staying optimistic, always believing we could do it despite any obstacles. We held onto each other and walked. I noticed that Frisk leaned a little bit on me, and I wondered how badly they were actually hurt. I had long since learned that Frisk wasn't entirely honest when it came to how bad their injuries were. I just hoped they didn't have any damage that wouldn't heal in a little bit. If this strange place was anything like the surface, we would need to be in our top condition at all times. We couldn't afford to be weak.

We hobbled across the room and viewed the large door in front of us. It was menacing, somehow. It seemed like the entrance to some devilish place which would be even worse than our home. I certainly hoped not. Our home was more than bad enough. But at the same time, the door seemed to invite us, saying "Come join the fun." Because that didn't sound threatening at all.

As Frisk and I walked, I noticed the symbolism here. Even though we were badly injured, we were still together. We always would be, together as twins. And we always would find a way to keep persevering. Frisk would make sure of it. They were always so good at doing that. They probably hoped that we'd get out of here, or even find a better home. I just hoped that we wouldn't die or get tortured. Because looking at the door, that's all I felt would happen.

"Turn off your theme song," I told Frisk. While I loved the music, there was no way we could afford to have someone hear our song. It was far too risky. A couple seconds later, Frisk's theme song stopped. I knew they probably wanted it just as much as I did, but we trusted each other completely. They knew if I said something, it was probably important. And I would do the same for them, of course. But I noticed things more often. I was the more perceptive of the two, and I could say that without shame. It was true.

We entered the large door, and were greeted by a desolate scene. Rubble had built up all around us, seemingly enclosing in on us and threatening us. Rocks were strewn around the room, which only highlighted the fact that we were probably in a dark place. A group of rocks blocked an exit ahead, but there was a little gap Frisk and I could probably squeeze through. The ceiling looked like it could fall on us at any moment, and considering we were hundreds of feet underground, that was a very scary thought. And in the corner of the room, there was a little dirt pile, so dark and hidden that I hadn't noticed it before. And in the center of the dirt pile, there was a yellow flower.

The flower looked like it was supposed to be yellow, but so much dust and dirt had accumulated onto it that it looked brown instead. The flower had six petals, and the top left one had a jagged cut running through half of it, nearly splitting the petal in half. The petal near the right side of the flower looked like someone had taken a bite out of it. The situation looked so terrible that I found myself feeling pity for the flower. It didn't deserve to be in a hellish place like this one. It didn't deserve to be nearly dead because of the lack of sunlight down in the place. And I wondered how the tear and the bite had arisen. Perhaps a rock or two had fallen on the flower? There was certainly enough rubble to support that hypothesis.

Then the flower moved, and I was so surprised that I recoiled in shock. Of course, Frisk didn't even move. They just looked curious. As I looked at the flower more closely, I noticed there were some features I had missed. In the middle of the flower, there was a face, complete with two eyes and a mouth. It looked as torn and worn down as the rest of the flower did. I wondered what kind of place we were in, with flowers that could move and probably talk. It seemed like we were in a broken fantasy, where everything was supposed to be happy with talking flowers but everything just felt a lot worse.

Then a song started playing. It sounded like a happy tune, but it was so slowed down and distorted that I got a feeling of hopelessness. Frisky and I looked around wildly, but there was no audio player. I wondered where in the world the music was coming from. There was really only one possible solution, which simultaneously filled me with confusion and joy. At last, we had found someone else who had a theme song. Even if that was a flower. And even if the theme song sounded terrible. But at the same time, I wondered what had happened to the flower, to make its theme song so sad. Frisk's theme song always stayed happy, no matter what horrible things happened to us. And here was someone whose theme song sounded like a depressed version of happy birthday.

Frisk had seemingly come to the same conclusion that I had. They slowly took a step forward, probably trying to comfort the flower. The flower only regressed more into the shadows, as though it was trying to hide from us. The flower began to speak, confirming my guess that he could.

"Pl...Please don't kill me," he said, shrinking and cowering away from us.

Frisk and I shared a worried glance. What possibly could have happened to this flower to make it so afraid of everything, even a random stranger? What kind of world was this?

Meanwhile, I was worried that this was a trap. But the entire setup...just logically thinking about it, it couldn't be a trap. No trap would have someone looking so worn out and terrible. And I could tell the flower wasn't faking his injuries. They kept shaking, and their petals seemed to close in on themselves as though trying to protect the flower.

"We won't kill you," said Frisk gently, who took a step towards the flower. I was still a little bit unsure, but I followed Frisk. They always knew the best for me, and I doubted that would change now. Plus, I wasn't going to let Frisk walk towards a possible trap alone.

"You...you're sparing me?" replied the flower, unsure, and I wondered why they were so quick to trust if they had seemed so scared. It was almost as if they were making a choice, as if they could go back and fix their error if this was a trap. But I was probably thinking into the scenario too much. I focused on the flower, who had started speaking again. "I-I've never seen someone SPARE something before," he continued.

Again, Frisk and I looked at each other. I could guess their thoughts: 'What was this world?'

"Don't worry. We won't hurt you," said Frisk. "I'm Frisk, and this is my twin Chara. What's your name?"

"Flowey," he responded, and if it wasn't for the hopelessness of the scenario I might have laughed. What kind of name was Flowey for a flower? It was almost as if he had named himself. But that made no sense. 'Actually, if flowers grow from the ground, do they get to name themselves?' I pondered. I guessed that made sense.

"Here," said Frisk, holding out their hands. "You can come with us."

The flower still looked unsure, but slowly hopped into Frisk's hands. "Quickly," he said, looking a little less scared. "She could come soon."

"Who's she?" I asked.

"There's no time to explain. Just try to get me to the next SAVE point—er, try to get me past that brick wall," he responded.

I suddenly heard a loud crash, and Frisk and I simultaneously began to hobble as fast as we could through the hole in the rubble. I reached it first, and quickly squeezed through the gap. Beyond the rubble was a pink room, as ruined as the last one, and two sets of stairs on either side. There was a bright yellow star right in front of us, rotating off the ground. But I didn't have time to admire the scenery. I continued limping forward, which seemed somewhat counterintuitive, because we were going towards the noise.

Frisk and Flowey squeezed through behind me, and I heard a gasp. "Wh—where's the..."

"Where's the what?" asked Frisk. "You mean that yellow floating star?"

"You see a star? Touch it!" yelled Flowey, sounding almost desperate.

I waited a moment for Frisk to catch up, and Frisk held Flowey with one hand and me in the other. Together, we reached out with our linked hands and touched the star.

I can't describe what I felt during those moments after touching the star. It was almost like we were solidifying a point in time, where we could go back to if we wanted. I'm being honest, I got that much from one star. It didn't make any sense.

But I didn't have time to ponder on it. Suddenly, we heard a large crash above us, and someone—or something—walked into the space above us.