you were attacked by a demon (...again☠️) and you were bleeding out close to death(😱😭) once tanjiro killed the demon he gently put you over his shoulder and started running to a safe place to treat your wounds. You guys had met multiple times before you were known for being really kind and a sweetheart which is why he cares about you so much so he wouldn't want you to get hurt. So he'll do anything in his power to keep you alive (he's so cute sobs)