UnderFell Sans X Reader

SANS!

Recall~
You had prank Underfell Sans by replacing his mustard with ketchup and he got mad but at that time you knew you fuck up as he bit your neck You think he just marked you

Back to reality ~

You had went for a walk around Snowdin with Flowey around your neck as Flowey wanted to get some fresh ground dirt as you went far away from Snowdin and went to the post where you hid from Papyrus as you set Flowey down and his roots attached to the ground. "Well.. We can rest here a bit but we need to find you a pot where i can put you in.. I cant keep walking back here for you..." "Well Im sorry im a freakin plant! I didnt wanted this... Anyways... Thanks again [Y/N]! It nice to know there some good here.... Well while we here lets get more training!" You sigh softly you had been slacking off with Sans when Papyrus wasnt around anyways You went into position as your soul came out of your body. "Well im ready Flowey!" Flowey nodded as he send some pallets towards you but wasmt much and was slow so you can move around a bit.

~30 minutes later~

"Flowey calm down! It too fast!" You had been dodging the pallets over and over and it got to the point where you cant dodge some but took some damage as you only were left with 5/20 as you dodge and dodge till your legs gave up and you faceplanted on the snow "... Wow.." Flowey was laughing at your faceplant as he burrow underground and got close to [Y/N] as Flowey helped You up and both of you just looked at each other talking a bit but was interrupted by something snapping as that got you scared so you jumped up and looked around "anyone there?!" there was no respond as this kinda worried you and Flowey and cause of that Flowey wrapped it roots around your arm and held tightly "[Y/N]... Lets get out of here..." You nodded as you head back home as you walked you heard something that scared you which got you more scared and cause you to pick up your pace to running you ran and ran till you saw something being thrown to you and you dodge it in time only to be lift up from the floor and sling to the air "AAAAAH!" You then were falling to your doom and was about to hit the floor till you were 1 in off the ground "w-what the heck!" You were scared as hell this was the first time you got attacked like this.. You looked up to See Sans in front of you with his left eye glowing red "SANS WHAT THE FUCK YOU SCARED ME!" Sans laughed as he put you down "sorry [Y/N] i had to let you fall like that it tickle my funny bone" You laughed at his puns as You got up and looked at Flowey who was really shaking up from the fall as you sigh softly "lets get back to the house Sans.. You scared Flowey and we also need a nap.. Today my last day here now i have to go back to Alphys tomorrow.." Sans nodded as you both walked to the skelebros house as you try to make Flowey less scared.