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“GET BACK HERE, HUMAN!”
Frisk kept running, eyes wide with panic and desperation. They didn’t dare look behind them and see how close she was gaining. They couldn’t risk the thought of one of those hands being inches away from their neck. They kept charging forward, eyes locked on the distant end of the dark hallway. Any distractions could disrupt the adrenaline rush.
They could hear Undyne’s pounding footsteps over their raspy panting. Sometimes it sounded as if it were getting closer. Other times she seemed to pause, only to speed up rapidly. A thought flashed in Frisk's mind: She’s toying with me.
As if to confirm their suspicions, Undyne shouted again. The words hit Frisks ear like one of her spears.
“YOU CAN’T RUN FOREVER, BUT I CAN!”
She wasn’t wrong. The chase had only begun about ten or so minutes ago, and despite all the youthful energy a little kid like Frisk possessed, they couldn’t even dream of outrunning Undyne in any scenario. All they had to hope for was finding a quick escape.
Frisk glanced side to side at the walls rushing past them. There seemed to be no sign of anything they could use to get themselves out of this situation. Nothing but blank wall after blank wall, flat and bare, slowly closing in on Frisk like a suffocating shadow of a horrible beast. All too late did they realize how accurate this feeling was.
Their heart leaped into their throat as they skidded to a halt. Frisk could only stare in silent horror, mouth agape as their brain desperately tried to convince itself that it wasn’t true. A blank blue wall had greeted them at the end of the hall, trapping them in this tight corridor.
Frisk's hair stood on end, and once their mind caught up to reality, their body followed suit and whirled around to press their back to the wall. They clutched it with a whimper, knees buckling.
Undyne stood there, grinning. As Frisk shrunk to the floor, she slowly approached, as if savoring every second of the hunt before the final strike. “Nowhere to go now, punk…”
In a flash, she reached out and snatched Frisk by the collar of their shirt. The little human squirmed and kicked as hard as they could, but Undyne’s arm was like steel, barely even flinching. Still grinning, she lifted her other arm, curling her fingers with malicious glee. Frisk froze and began shaking their head rapidly.
“P-Please, Undyne, I-I can explain--!”
“Save it, kid.” Undyne said in a cold whisper. Her lip curled into a sneer. “You’ve had this long coming…”
Without another word, her hand plunged.
---
Sans’s nap was unpleasantly woken by a loud shriek piercing the quiet spring midday.
Jolting upright, Sans sputtered halfway through a snore and fumbled off the side of Toriel’s couch. Sitting up, most of the cobwebs cleared away the instant Sans heard Frisk screaming. He went stiff for exactly one second before dragging himself to his feet and bolting.
Luckily he didn’t have to go far. The screams were close, right down the short corridor leading from the living room towards Toriel and Frisks rooms. Sans grabbed the corner of the wall and whirled himself around to see what was happening.
Undyne had Frisk by the shirt, and she was rapidly digging her hand up and down the tiny human’s exposed belly. Frisk was squealing with hysterical laughter, kicking and stamping their feet wildly as Undyne pinned them to the floor.
“Admit it!” Undyne said, cackling with delight as she tickled the human. “You were the one who ate my chisps!!”
“ Y-Youhou cant prove it!!” Frisk wheezed between laughs.
Finally Undyne paused. “Oh really?”
Without warning, Undyne snatched Frisk again and tossed them in the air, catching them by the underarms. “Then I’ll just have to spin you around till you puke them back up!!”
Sans let out a huff of relief, leaning against the wall to enjoy the sight. Frisk’s desperate squeals gave way to delighted giggles as Undyne spun in place, holding them outward like a mom and her baby playing at the park. Ignoring the fact that Undyne was gradually gaining speed, eventually turning into a blue tornado that was destroying Toriel’s carpet, the skeleton had to admit it was pretty damn cute.
Deciding he had peeped long enough, Sans shuffled back on over to the couch and flopped down, hands behind his head in contentment.
“ She aint a softie like you, bro ,” He thought. “ But she’s got her moments of tenderness. ”