After the mission you and Tanjiro were sent on, you both went to the butterfly mansion like normal to heal and then train to be ready for your next missions. None of your injuries were that bad, but some will leave scars

When you woke up in one of the beds in the butterfly mansion, the wound on your arm was half bandaged and Tanjiro sleeping next to you with the bandages in his hands and dark circles under his eyes. He must have fallen asleep whilst bandaging you instead of himself