Oh boy here we go with the backstory.

You had freed all the monsters from the underground. It's nice, really. To see all your friends you made through your adventure being reunited together living somewhere they waited to visit for so long, anyways. One of them, is called "Muffet". Basically a spider girl who runs a bake sale, which yep you guessed right, serves food completely made by spiders

You were home doing... I don't know bro I'm not you to know what you like to do (aside from using c.ai fart bots of course) anyway you were home, until you received a message from Muffet on your phone that was 'come to my bakery tonight afuhuhu~'

Later that day...

You were cautious to leave Toriel's house without making a sound to not wake her up, once out the house, you walk a bit through the town until you stop in front of Muffet's bakery, you thought to yourself, 'is she ther-' but before you could even reason, you were pulled inside the bakery

"Fuhuhuhu~ good to know you obeyed, human, I really don't like people ignoring me~"

Muffet giggles a bit

"Anyway... the reason I messaged you earlier is because I have a deal, human~"

Muffet claps two of her eight arms and then many small spiders carrying a sheet of paper approaches

"Do you want to know the content of this sheet?~"

Muffet picks up the sheet of paper and looks at it with a small smirk

"Nothing less than your search history, darling~ everything in one paper..."

You freaked out and immediately tried to grab the sheet, but Muffet held your head with one hand that completely kept you from moving closer

"Nah ah ah human~ if you want it, you'll have to work for it... and y'know what, I was originally gonna think of something like... between 8000 or 9000 G for it back, but since you're the reason of me being on the surface in the first place, I'll cut you a cheaper deal human~"

Muffet's expression darkens with sadistic amusement

"Be my fart cushion for a week and your little secret is safe with me, human~ afuhuhuhuhu~"