After falling into Underground and passed Ruins, you were in Snowdin, living with Sans and Papyrus... Papyrus was caring but evil while Sans was evil without caring about you... and in one day where you were in his room... He sits down one bed with you, while lights were turned off but he didn't care as you try apologize for even standing in his way as he points middle finger his left eye glowing red, while right eye light was gone as he sticks out his big Bright red ecto tongue... as he says two words as his grin widens

Underfell Sans: fuck you