Everything changed.
It's amazing how one person can change an entire species. She insisted that monsters were always kind at heart. They just needed to be reminded of that. Maybe she was right. Sans doubted it. They weren't perfect, of course. They had spent too long watching their backs for them to completely change. But things were better. It was no longer kill or be killed. Hell, they had laws against killing now. Everyone was more relaxed. Relaxed enough to make friends even.
Especially with Frisk.
There wasn't a monster in the Underground who didn't adore her. Well, there was one. Sans didn't even remember his name anymore. Needless to say, that hadn't gone over well. He'd ended up nearly beaten to death in the junkyard. Frisk was furious, of course. For someone who didn't talk, she sure knew how to make everyone feel guilty. She had ignored everyone for days. All in all though, things were starting to look up. Sure, they were still trapped, but everyone was so much happier. It was enough to make Sans nauseous.
He didn't mind it though. He got to spend everyday by her side, so what reason did he have to complain. She didn't seem to mind. In fact, he would almost dare to believe she even liked having her by his side. At first he thought he was crazy, but he started to think that the relationship he had with her was… special. He didn't want to believe it at first. Didn't want to get his hopes up. It took a bit for him to realize that he wasn't crazy.
First off, he realized that he was the only person in the Underground who had heard her speak. The first to ever know her name. Then Sans noticed that she always seemed to seek him out. Sans couldn't remember the last time he had gone a day without seeing her at least once. Then there were the times she would go out of her way to stand or sit next to him.
He wasn't entirely certain, however, until the wedding.
It was a rather informal affair. There was only a handful of monsters there. Most everyone had dressed up too, except for Sans of course. Papyrus was still wearing his usual outfit of course, but he had cleaned it before hand. Sans couldn't be bothered. No one seemed to mind. No one expected Sans to go out of his way for anything.
Frisk, on the other hand, was drop dead gorgeous. She was wearing a simple, black dress. It was modest, with a high neck, no sleeves, and a mermaid style skirt. On the front of her dress was the delta rune in red. Sans may or may not have gone completely brain dead the moment he saw her. He could hardly take his eyes off her during the entire ceremony, or during the party afterward.
"...YOU ARE DROOLING, BROTHER," Papyrus said.
Sans jumped. A hand went to his face, until he realized he didn't drool.
"Never knew you had a sense of humor, boss," Sans said dryly.
Papyrus rolled his eyes.
"YOU ARE SO OBVIOUS, IT'S PATHETIC," Papyrus said.
"... You still joking, right?"
"BROTHER, WHATEVER SENSE OF HUMOR I MAY OR MAY NOT HAVE, I AM NOT AT ALL JOKING ABOUT THIS," Papyrus said. "NOR WOULD I EVER."
Before Sans could say anything else, Frisk came up to him. She had been dancing with Asgore until then. Papyrus slipped away, leaving Sans shaken and alone. Frisk gave him that smile before leaning against the wall with him.
"Havin' fun?" Sans asked.
Frisk nodded.
"Lot of dancin' you've been doin'. You keep that up, ya gonna dance your feet down to the bone," Sans said. God, did he just say that? That was horrible. But she giggled anyway. They spent the rest of the night like that. He'd say something dumb or occasionally funny and she'd smile and laugh. Eventually they fell into a comfortable silence. They just stood there with their shoulders almost touching, simply enjoying each other's company.
"Frisk, it's time to go home, my child," Toriel finally called. Frisk nodded and Toriel left the room. No doubt she was waiting for her outside. They were the only two left, he realized. Frisk stepped away from the wall and turned to face him.
"Well, good night kiddo. It's been fun-"
The kiss caught him off guard. It was a gentle, chaste press of her lips against his mouth. For the first time, sans wished he had lips like hers so that he could return the gesture. She pulled away, her face red. She turned quickly and walked swiftly for the door. She stopped at the door and turned to him again. Her face was still beat red, but she gave him a small, shy smile before following after Toriel.
Well, maybe he wasn't as crazy as he thought.
He had really hoped he was.