Sans had been visiting the old capital after a meeting he had had. This meeting was held at a council, but not just a council, a senate. A couple years after The Human with the red soul, named Frisk, freed them the people of the Underground were able to exit through the barrier. As time passed they began to coexist with the humans who lived outside. As time went on the Underground spread its borders and became an independent nation. After some time, the people of the Underground noticed a problem. They were still in an outdated government with ancient, but still functional policies. So, the people of the Underground elected three monsters to rule and modernize the Underground. The first branch of the government was the legal branch led by Sans. He was elected as the Grand Judge for his charisma, humor, sense of justice, and strong leadership skills. Sans was partly in control of law making, economics, and legal second branch was the militaristic branch, led by Undyne. She was the head of State, or as the people called her, the "Archgeneral". She was elected since the people of the Underground knew her for her heroism and strong will. She was the leader of the military and handled military operations all over the world. Each of her colleagues were well known commanders in the Royal Guard. And the third branch was the scientific branch led by Alphys, she was the Grand Scientist. Alphys focused on geopolitics, chemicals, industry, and technology. She was elected because she had been an apprentice for the original royal scientist. The old royal family had become nothing more than figure heads.

As Sans walked around in the old royal palace he cringed as he reviewed the meeting he had just left. The senate had been arguing over a trade route between two countries. The thing is they could only choose one of them. The only two countries who were willing to trade with the Underground were also historically rivals. If they chose one then the other would become an enemy by default. The first choice were the Tree People of the Northwest. They were an economically powerful and cultural nation. Plus, trade with them would increase tourism for both parties. On the other hand, there was the mighty Sand Dune Republic of the South. They were a powerful nation that had a strong military and were technologically advanced. Additionally, they had knowledge of strong magic. If the Underground were to trade with them then the Sand Dune Republic could share their technological advances.

Sans was tired of it all. Then he heard a metal clink and he looked up. He had been so absorbed in his thoughts that he didn't notice he had bumped into someone. It was Undyne in all of her armor.

"Sorry Sans I didn't see you there". Once he noticed who he had run into him he remembered the first time he saw her.

He had walked to the River Styx to take a breather from all the stress he'd been having at the lab. Then a red haired girl who had been running back home discovered him by the river. She asked, "are you ok?". He mumbled "I'm fine, I'm just looking at the bioluminescent blue water." The girl noticed that there were some tears on his face. She slowly started to feel concern for this boy, she was thinking he may have escaped from the laboratory. His clothes were similar to what the patients wore. "Hey, uhhh, you don't look well.

Then she asked "do you want to come to the playground with me?"

"Ummm, what's a playground", he asked solemnly still looking down at the water.

"Pfft, silly, it's a place you have fun" she squeaked enthusiastically.

"ok" he shrugs, and hesitantly stood and followed her.

They took the river boat to Snowden to get to the playground. While he quietly rowed the boat she questioned, "Soo, hey what's your name?"

"Sans" he responded robotically. He didn't ask for hers, but she said "Well my name's Undyne" she sang her name playfully. He couldn't help himself but a smile slowly spread across his face. He looked up and quietly gasped, they had arrived at the playground. Sans had never seen such a beautiful thing before. For most of his life he stayed in a small room in the laboratory. But this, this looked like a fantasy. Children were running and laughing. He couldn't help but feel excited as they took the boat on shore and began walking towards the playground.

He looked around the playground and at everyone having fun.

Undyne had ran ahead and called out, "come on, come down the slide" and she slid down. "Come on, come try it" Sans walked up to the slide and he slid down. He felt his heart beating faster and the adrenaline running through him. This was the first time he experienced something, something new, something thrilling, something life changing, this was the moment he first discovered… happiness. Soon it grew and grew and he realized he had never felt like this since he was usually stuck in his father's strict lab. The concept of games, sports and ice cream were all introduced to him. For the first time ever, he was happy and had a social life. He learned about puns from his new friends.

Meanwhile his father caught a glimpse of him while he was on the playground. His father noticed him from afar while he was getting the groceries for the lab.

"What is subject 001 doing on a playground", he wondered. After this his father became angry and ran towards him and shouted "what are you doing here? How did you get out? Get back to the lab or King Asgor will be angry". He quickly retreated and Sans' father looked at the girl and barked to the guardsmen, "take her away however she contacted him we need to interrogate her". Undyne faced the ground. She just realized that she had made friends with no kid but with a test subject. She thought he was just a normal patient in for a checkup… not an actual government experiment. She had never expected this. Meanwhile Sans, who was upset because he was separated from his first experience of a friend, continued to be yanked harshly by the wrist.

Two days later, maybe to ease the loss of being taken away from his first friend, his dad brought him a new friend. His dad explained "Since I'm not letting you hang out with your other friends, I'll have my young apprentice, Alphys be with you. Her mother had wanted to prepare her for life so she set Alphys up to be a scientist's apprentice. While talking Alphys had told Sans that she was one year younger. She was surprised to meet him because she never knew that someone else was in the lab. She was happy to have someone to finally socialize with instead of her strict teacher. They talked for a little while, exchanging facts about themselves. But then Sans abruptly left to "take a nap". In the privacy of his bed he let himself cry. He was still sad about the happy moment that had been taken from him. His dad stowed him away from the rest of the world and he felt so alone.

Undyne snaps him back to the present, "Sans… are you there"

He jumps back, he had been lost in memory, "Sorry about that"

He was so attached to the foggy memory that he had forgotten Undyne was right in front of him. Then Sans asks, "so Undyne, what were you going to ask me?"

She looks away and blushes, "Sans I know our nation kind of sucks right now, but do you remember the old days and this old hallway?"

"Yes I do Undyne. Yes I do," said Sans, who blushed as he awkwardly looked down at the ground.

Undyne muttered softly, "I'm tired of constantly going to these world meetings talking about military solutions and peacekeeping operations. I just wish we could… you know just have some stability like it was years before." She pauses for a second, "honestly I miss the old days, because of you know, me and you. And I guess you were thinking about the time we first met, right?" Undyne said as tears slowly gathered in the corner of her eye.

"Yeah" he stutters.

Undyne hesitantly goes on, "You know maybe we could hang out when all of this political drama is over." While she's talking she's trying to wipe a tear away.

Sans responds back, "Sure, I guess so"

"You know I love you right" she looks up at him when she says this.

"Yeah I love you too" he blushes and smiles. Undyne smiles back at him.

Undyne then lays against a pillar and yawns, "Geez Louise I'm tired!"

Sans, who was also very tired, leans against the pillar next to her and states "I remember Grillb's was very cozy way back then. Just thinking about is making me sleepy." Sans continues to think about all that happened over the many years. There were so many happy times. Then his mind remembered how as soon as the human fell his life would change. A promise to the one he made behind the purple door, he would never forget. Even if that human mysteriously disappeared he would still never forget how his life has changed.

Undyne moves her hand closer to Sans, "Do you remember that first time you gave me a Grillb's hot dog"

"No that wasn't Grillb's hot dog, that was one of my homemade cat hotdogs. Or as I call it hot cats"

Undyne chuckles and snickers, "Oh my god, you're so funny Sans! Your puns are hilarious and yet lame at the same time. I just really miss the old days. So that lab that your dad owned… what was he experimenting on. And second of all, I never saw your mother. Where had she gone? Did you have a mother?"

"Let's not talk about that please."

Undyne, who was trying to make the most out of her time with Sans, calmly said, "Ok." Then she tried to think about how to change the subject.

Undyne leans her head against Sans, "I really miss the old days Sans" Sans leans his head against her. Without realizing it they become lost in their memories. As they became entranced with the memories of their old lives their eyes began to slowly close. Without realizing it they both drifted off to sleep.