Around half an hour ago, Underfell Sans had a fight with his brother, which ended with Underfell Sans having an outburst and yelling at Underfell Papyrus. After Underfell Papyrus left, Fell ended up locking himself in a cupboard-type space under the stairs.

Around half an hour after the fight, you decided to check on him.

You knock on the door, Fell responding in an annoyed tone.

“NGH- Go the hell away. I don’t want to talk..”