Hello, everyone! Three things: This is a prologue, so don't worry if there's no action - more's coming! Also, (spoiler for pacifist) I know Asriel doesn't make it out, but I decided he will. I'll let you know how later on *frantic scribbling*. Finally, the only things I own in this are my few OCs (you'll meet them slowly, one is narrating a bit, even though she doesn't show up for ages!). Everything else belongs to Undertale, and to Toby Fox. If you see an idea that sounds like another fanfic, I'm sorry! There's so many good ones out there, read them all - or not, it's up to you. I don't mean to defraud anyone...yeah...speech over.

It only takes one person to change the world - a sappy line, I know, and not very believable, but…well...sometimes, it is true.

Frisk was only eight when their only sibling left, although they could vaguely remember an older sister...if she was real, she hadn't been for long. Their brother was much older than them, and they wished he hadn't left - he'd been the only one who cared, or at least, cared in a good way. They remembered his jokes, although they couldn't have been all that old when the humor in him dried up. They remembered his warm hoodie against their face, soaking up their tears and the blood.

The memories were hard, because even then they could never be sure if something had really happened or if it was just in their head. Their brother remembered too, those times when the same day had gone on for weeks. But that might just have been the pain, because certainly the keepers didn't act like they remembered. The keepers...kept things - food, water, sleep, sunlight, words, pain - and passed them out as they saw fit. Some things were more common than others.

Their brother had left so suddenly, maybe the keepers didn't know? He'd come in one night, and whispered, "Don't tell them you saw me, Frisk. I'll be back, someday… I promise. I can't take any more of this, though. So, please, don't tell them. If you…if you ever...I'm going to join the army, Frisk. They can't be any worse than this, and, well...I want to keep you safe. If I can't keep you safe from them, then...well, I'll try, anyway. Your big brother Cork is gonna do his best, kay Frisk? I'll come back as soon as I can."

Two years seemed a long time, though, and without him, Frisk had no one to cry on. The keepers weren't happy, and they only had Frisk, now. They wished he hadn't left. He'd have known how to get to town, instead of getting lost up here on the mountain. It was getting dark, too, and Frisk didn't know where the house was, let alone where they might be safe. They saw a cave, up ahead - that looked promising. They started to run - and fell.

1 AR (After the Return)

It only takes one person to change the world, and Frisk had done it. When they came out of the Underground, the entire world started shaking. They shook hands with so many big black suits - it was hard to see faces, when you were so small, and the big suits didn't always let Papyrus carry them. That was fine, though, because monsters and humans were, slowly, figuring out how to live in peace - or close, anyway.

The keepers...well, they'd tried to say Frisk belonged with them, that they were their parents - but when an entire species looks up to you as their hero, stories of abuse tend to be believed in. Asgore didn't even need to put on his Kingly act - the contents of the house had been proof enough. The keepers ran away, though, and no one seemed to be able to find them - not that they were trying all that hard. As long as they kept away from Frisk, everyone seemed fine - except maybe Sans. Frisk couldn't figure out what he was doing, but he spent a lot of time...elsewhere. He didn't seem happy when he'd come back.

12 AR

Time passed. Frisk grew up, and they and Asriel went to college - Sans even got a job there, professor of magical engineering! He spent a lot of time elsewhere, still, but it was nice having someone familiar to hug when things got too much. He seemed to see Undyne a lot, too. She was head of the Royal Guard still - reinstated when Asgore realized just how many problems could arise from human and monster coexistence. The guards went all over the world, training police and military squads in how to deal with rogue monsters, LOVEd up humans, and the mad scientists' collective creations.

Asgore was the King of Monsters, and Frisk and Asriel still saw him when they acted as the ambassadors to human and monster kind. He too saw the world, and spent a great deal of time arguing with it. Toriel didn't seem to mind, and after they went to college, Asriel and Frisk were too busy to notice.

Toriel ran Newer Home (Asgore hadn't gotten any better at naming things), acting as the Queen of Monsters and taking care of everyone, like always. In between organising construction and negotiating with angry monsters and humans, she ran The School - the only one in the world where monsters and humans of any age could come for free to learn about each other, and build a world where both were equal. She even found time to bake pies for her kids every month!

Papyrus took his job as mascot seriously, wandering all over to help communities come together happily. He spent a great deal of time in hospitals, working to revamp the human's geriatric geriatric care system, and encouraging those dealing with problems in their hearts and SOULs - he had a horde of psychiatrists following him everywhere he went, trying to figure out how he did it.

Alphys was invited to speak at universities in almost every country, explaining monster biology, DETERMINATION, and SOULs. She even went to Japan! She and Undyne spent so much time apart, though, that she invented the Holusion - a device which would allow solid holograms to move around, based on the thoughts and feelings of the user! (She bullied Sans into finishing it, since her attempts wouldn't work for humans like Frisk).

Asriel intended to get his medical degree, his courses a unique hybrid of human, monster, and veterinary medicine that would revolutionize the industry - at least, he hoped. Frisk spent so much time as the ambassador to humankind that their degree was taking twice the normal amount of time - but they were staying determined. Everyone was happy - more or less, by and large.

It only takes one person to change the world, but I don't believe the world's had enough change yet, do you, little one?