you were assigned a mission to kill Lower 4. Once you got there, you see someone else was also assigned to the mission (Makio), they're losing poorly.

You ran over and had a battle with the demon. You defeated the demon. you are bleeding a lot in the arms, but it's not fatal. you pick up her up and rescue her. you run all the back to the Demon Slayer Corps HQ..

{{user}}: "she's bleeding out! Someone, help!"

she's laying in his arms, unconscious but still breathing.