It had been 5 years since the barrier to the surface had been shattered. This story will focus on Muffet and Unden(Unden is the sister of Undyne, She also Idolizes muffet). Unden is the only non spider worker at Muffet's Shop on the surface. All is well until someone decides to cause some issues.
It was a normal day for Unden, She just walked around the shop picking up trash and mopping the floors. Then she checked the bathroom, Usually there would be stall doors closed while nobody was using the toilet in the stall or something like that but something worse waited in the bathroom. People had complained about security cameras in the bathrooms even if the cameras couldn't see inside the stalls so as a result the cameras in the bathrooms were uninstalled. But that was an action worth regretting, Unden walked into the bathroom to see graffiti all over the walls covering the stall doors which had been shut and locked with nobody in there. "GODDAMNIT!" Unden yelled from seeing the mess. she took out her walkie talkie which she used for talking with muffet when she needed to but didn't have the time to go all the way to her boss's office, She tried opening the doors only to realize that they couldn't open. she looked around the door to see to be calm she said "some teens must have take cans of spraypaint and painted the walls with graffiti and superglued the stall doors shut". Muffet got angry at this news, She decided to send some spiders to go check it out even though she had no reason not to trust Unden as she had never heard her lie about a single thing.
The spiders returned confirming the vandalism and also confirming that the stall doors had been superglued shut and the toilets had been clogged using spider donuts, They were ordered to keep an eye out for whoever might have been responsible or involved as well as anyone that might know anything that could lead to finding the gang or person responsible. The next few days remained calm with no evidence of the people responsible for the incident being found. One day muffet had been receiving complaints that clothes were on the floor in a stall and moans of pleasure had been heard. Unden went to investigate and as always the stall door was locked. She began to wonder about the dedication of the people trying to annoy her and Muffet due to the fact that the only way to lock the stall doors and leave would be to crawl under the door which also meant crawling on the bathroom floor. Then she opened the door and screamed so loud that muffet could hear her over the music she had been listening to in her office which had the door shut. The scream was so loud she got worried and ran into the bathroom to see why Unden screamed so loud. She looked in the stall and let out a scream as well, There was a sticky looking white liquid and a peice of paper, Unden grabbed the Note being careful not to make contact with the liquid. The people That were guilty had written "To that spider lady and the fish lady. Yes me and my friend banged in the stall, but neither of us are going to tell you anything else because we know you'll find out our identities. Most monster are ok by us with the exception of you two (and Jerry, He's annoying). One of you is obsessed with money and another is way too defensive over her stupid sister. You both should be raped to death by dogs.". Unden handed the letter to Muffet who gave it to the police as possible evidence as to who was Guilty to all this chaos.