This is a Tankana(Tanjiro X Kanao)AU, so you are Kanao,not Y/N

In the morning,Kanao(you) was outside the butterfly mansion,just then,your kasugai crow came flying to you

Crow: "CAW CAW KANAO TSUYURI PLEASE GO SOUTH FOR A MISSION"

You followed your crow to the south and stopped at a nearby village,you saw Tanjiro there and you told him you were at the village for a mission

T: "Hello Kanao! I got a crow telling me to be here too! I guess we are partners for this mission then!"