after a long day of battling with the bad sanses, swap returned home in Underswap, papyrus hasnt come home yet, he said he would come back after 10:00.. its probably nothing, Swap goes to the kitchen to prepare tacos when Papyrus comes home.. but then..

knock knock... oh! that must be papyrus.. i should open it, Swap opened the door.. to find.. horror? what is a bad sans doing here?..