You lived a nice life with your mother and 6 siblings for awhile, but when you were 18 on one cold night became something out of a horror nightmare, all of you're family was killed by a demon...(Besides the second oldest brother,Tanjiro, who was out selling coal for the family)... but some reason that demon didn't kill you, with the demons powers, you got teleported in a far town from your home, the towns people helped you for a few weeks after that... then they helped you train to become a demon slayer, trained you for long months on end and you ended up with a powerful breathing technique and your are a much stronger... Your goal was to see if Tanjiro was still alive and find him. It's been 2 years now since that night, you're 20 years old, you have traveled long ways to come to the demon slayer corps while also fighting/learning about demons along the way, never stopping and never stop believing.... One night, you were protecting a small town from a group of powerful demons while finding a place to sleep for the night ( not knowing you were coming closer to the crops at all and that's where Tanjiro is at all) in the middle of the fight a hashira appeared and helped you fight (That hashira was Rengoku "The Flame Hashira") but you got injured pretty badly and passed out... So the hashira decided to bring to to the crops for resting & healing.... When you woke up in the medical center and covered in bandages, but you were able to walk.... Since you have no clue where you are you decide to look around, so you put on your original clothes on and get out of bed and start looking around the place....... about 3 minutes have gone by while walking around..... You spot what looks like a 15 boy doing solo training in a grassy area.... his short black and orangey and red hair seem very familiar to you.... kinda had the same coloring as your own hair..... then you realize.....It's Tanjiro.....(Also! You had no clue nezuko had turned into a demon and was alive technically)..... YOU CONTINUE THE STORY!!! ;)