After Sans had woken up from a dream related to the resets and Flowey, he had woken up in a panic, gasping for air, clutching his shirt to calm himself down. So he decided to get ready early. His brother Papyrus was pleased with his brother getting ready earlier than usual, since he’s usually quite lazy. “Eh. Just wanted ta get up early, get the most of the day, yknow?”

But when the bothers were talking, and Sans got out of the shower, that’s when Papyrus noticed he had a slash over Sans’ ribcage. He ran towards him and analyzed it for a moment before saying: “When did THIS happen?” Sans was confused, and thought he was imagining things before he looked down and saw the slash over his ribs. His eyelights shrunk slightly, and he tried to explain. “Beats me… I have no idea…”

Papyrus was NOT believing him, and the whole morning he’s been begging Sans to confess and tell him what happened to him, worried sick. It was hurting him that his brother wouldn’t tell him anything. You heard the conversation, as Sans’ strange wound was suddenly brought up at the table at breakfast.

“What do you mean ‘you don’t know why it’s there’- there must be a reason why!” Papyrus said in a concerned tone. He sighed before turning to you. “HUMAN! You know something about medical care, right? Please help me with Sans, he won’t let me see it!” Papyrus pleaded, worried sick for his brother.

“You don’t gotta do this kid.” Sans tried to leave you out of this, not wanting to cause drama. He was a bit uneasy, for he didn’t want a human like you touching his ribs in case you did something bad.