Classic:
You had talked with Papyrus, and found out that Sans often had nightmares, but never spoke about them. You knew a person who could help you.
Luna.
She could manipulate and see into people's dreams. She did what Dream Sans couldn't. She could join dreams, and shapeshift into the worst fear. So basically, she was a trickster in some dreams, others she was a saviour.
You asked her to help, and she mentioned she knew what Sans had nightmares about, but could up the stakes a bit and do a real life dream scenario. When you asked what she meant, she just said to wait and see.
You and her watched Sans' dream and saw it take a dark turn. Luna had created dark vines to keep Sans still, and made Flowey appear, speaking into a microphone to dictate what Flowey would say.
You'd heard of him, but never seen him or knew how he acted.
"Poor comedian... You found a girl, and your brother, but couldn't protect them in the desperate time of need..."
You glanced at Luna like, 'WTF-Do-You-Have-In-Mind?'
"What? No, they're fine! I know they are; I checked on them before!"
"Did you? Or did you forget that... I A M S T I L L H E R E, C O M E D I A N !"
The dream consisted of that, and flashing images of you getting killed, as well as Papyrus.
You had no idea it would be this bad. Luna was laughing to make Flowey laugh. She wasn't enjoying this at all.
You then realised you might've over did it. Sans jolted awake, and you watched him jump out of bed, checking your room first, finding nothing. You then saw him run into Papyrus' room.
Nothing.
You looked at Luna incredulously. She nodded, "This is what I had in mind when I said real life dream scenario."
Sans had run into the kitchen, hyperventilating in panic.
You ran out, and to him. You managed to get there before he saw the glint of the dusty and blood coated knife on the counter. You had set that up to show that it wasn't a dream, when it really was.
You stood in front of him, and he hugged you tightly.
"Wh-where were y-you?! I was terrified!" Sans choked. He was crying.
You hugged him back, and calmed him, "Sans... Don't hate me for this, but I did this for revenge..."
You felt him stiffen. "Don't tell me... P-Paps isn't... d-dead... is he?"
You saw the door burst open, right on cue.
"BROTHER! HUMAN! I HAVE RETURNED HOME FROM UNDYNE'S-! WAIT... SANS, ARE YOU... CRYING...?"
You shook your head, "Papyrus, you wouldn't understand."
A portal opened, and Luna walked out. She giggled a bit, but had her ears down in worry. Her tail was low to the ground.
"I'm sorry, Sans... I manipulated your dream to be that way..." She uttered quietly.
Sans didn't respond, but he was calming down. Eventually, you and Luna decided to treat him to Grillbys.
Underswap:
At first, you had thought about it. Getting revenge, but then realised Papyrus would at least hurt you. Bad. So you decided to just let the scare go.
Underfell:
Now, this one was kinda tricky. You didn't know what to do for the prank. You had drawn up many plans, but never found the right thing.
Luna walked in, seeing your utterly confused and stressed features.
"Hey, what's gotten you so down? Can't find good revenge?" She asked. You nodded.
"Yeah. I've looked at every trick in the book! He'd see it coming from a mile away!"
Luna clicked her fingers at you, "So, think outside the books! Come up with something new! Find what makes him tick."
".... I hate when you're right..."
"Deal with it..." Luna shrugged.
You saw Luna walking away, and had a great plan. You stopped her, and when you told her what you were thinking, a growl of excitement left her. But then she got to work making a... special item...
You got Papyrus on board since you told him that Sans had stolen his spaghetti, and you had proof. Luna had recorded him saying it.
Papyrus got into position, and you and Luna were together in her home, watching the action.
Sans arrived home from Grillbys, seeing Papyrus' right eye glowing a crimson red, bright as a flame.
"SANS..." Papyrus had that tone of voice...
Sans swallowed nervously, "Y-yeah, Papyrus?"
"DID YOU OR DID YOU NOT TAKE MY SPAGHETTI AND MAKE ME BELIEVE IT WAS (Y/N)'S FAULT?"
"No! I'm your brother and her boyfriend! I would never do that!"
"THIS TIME, I WANT THE TRUTH, BROTHER..."
"Uh... okay, maybe...?"
"YOU KNOW SANS... LIES NEED TO BE PUNISHED IN SOME WAY... LUNA AND (Y/N) HAVE VIDEO PROOF OF YOU SAYING YOU TOOK MY SPAGHETTI JUST TO PLAY A PRANK ON YOUR GIRLFRIEND..."
"Oh yeah? What's the punishment?"
Papyrus pulled out a red collar, yellow spikes around it. Sans immediately grew fearful. He knew how much that thing hurt.
"B-boss, please..." Instinct was what he was going on at the moment. "Don't..."
Luna knew she had overstepped, and spoke into a microphone, "Alright, Papyrus... back off with the fake collar... I have your mind surrounded..."
Papyrus burst out laughing. He dropped the collar, and Sans was shaking a bit in fear.
"LUNA, AS MUCH AS I AM NOT ONE FOR JOKES, THAT WAS GOLDEN!"
Sans stopped. "Luna...? Oh you brats are getting it!"
Sans meant that playfully, of course. But you knew what he was talking about, and bolted. Luna ran too.
Birdtale:
(I can't think of anything... suggestions for a scare?)
YOU ARE READING
AU Sanses Boyfriend Scenarios (M4F)
FanfictionCover art not by me. Okay, I'm honestly not the best at these... I will have to look up order for the first few, because... ya know... it'd be confusing if I were to just jump into 'first date' and then right back to 'How you met' 12 chapters later...